CVE-2026-0265
📛 CVE Title
PAN-OS: Authentication Bypass with Cloud Authentication Service (CAS) enabled
Description
An authentication bypass vulnerability in Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to bypass authentication controls when Cloud Authentication Service (CAS) is enabled. The risk is higher if CAS is enabled on the management interface and lower when any other login interfaces are used. The risk of this issue is greatly reduced if you secure access to the management web interface by restricting access to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma Access® are not impacted by this vulnerability.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- palo_alto
- CVSS severity
- HIGH
- CVSS score
- 7.2 / 10
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Red- Effective score
- 7.2 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-347 - Reserved
- 2025-11-03
- Published
- 2026-05-13 17:38 UTC
- Last updated
- 2026-05-14 10:31 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/0xxx/CVE-2026-0265.json
- Linked Threat
- CVE-2026-0265 — PAN-OS: Authentication Bypass with Cloud Authentication Service (CAS) enabled
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-13 18:16:14 UTC
- NVD last modified
- 2026-05-13 18:17:47 UTC
- EPSS score
- 0.0003 (probability of exploitation in next 30 days)
- EPSS percentile
- 8.31% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 04:49 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-30066 - Assigner
- palo_alto
- Published
- May 13, 2026, 5:38:33 PM
- Updated
- May 14, 2026, 10:31:44 AM
- EUVD base score (CVSS 4.0)
-
7.2 / 10
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Red - EUVD-reported EPSS
- 0.0300
- Vendors
- Palo Alto Networks
- Products
-
Cloud NGFWPAN-OS (11.1.0 <11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33)PAN-OS (11.2.0 <11.2.12, 11.2.10-h6, 11.2.7-h13, 11.2.4-h17)PAN-OS (12.1.0 <12.1.7, 12.1.4-h5)PAN-OS (10.2.0 <10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34)Prisma Access
ENISA description: An authentication bypass vulnerability in Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to bypass authentication controls when Cloud Authentication Service (CAS) is enabled. The risk is higher if CAS is enabled on the management interface and lower when any other login interfaces are used. The risk of this issue is greatly reduced if you secure access to the management web interface by restricting access to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma Access® are not impacted by this vulnerability.
EUVD references (1)
Affected products (3)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Palo Alto Networks | Cloud NGFW |
All (unaffected)
|
— |
| Palo Alto Networks | PAN-OS |
12.1.0 (affected),
11.2.0 (affected),
11.1.0 (affected),
10.2.0 (affected)
|
— |
| Palo Alto Networks | Prisma Access |
All (unaffected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
- https://security.paloaltonetworks.com/CVE-2026-0265 vendor-advisory
Web references (9)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- http://cwe.mitre.org/data/definitions/347.html rapid7:cwe.mitre.org
- https://attackerkb.com/topics/CVE-2026-0265 rapid7:attackerkb.com
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30066 rapid7:euvd.enisa.europa.eu
- https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 rapid7:live.paloaltonetworks.com
- https://nvd.nist.gov/vuln/detail/CVE-2026-0265 tenable:nvd.nist.gov
- https://security.paloaltonetworks.com/CVE-2026-0265 tenable:security.paloaltonetworks.com
- https://www.cve.org/CVERecord?id=CVE-2026-0265 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
- https://www.hacktron.ai/blog/cve-2026-0265-panos-globalprotect-cas-auth-bypass tenable:www.hacktron.ai
NVD-tagged references (1)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://security.paloaltonetworks.com/CVE-2026-0265 psirt@paloaltonetworks.com
Indicators (1)
IOCs linked to the auto-promoted Threat row.
| Type | Value | VirusTotal | Attached |
|---|---|---|---|
| cve |
CVE-2026-0265
|
no local data | 2026-05-14 09:33 UTC |
Remediations (8)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:cybersecuritynews.com
Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.
2026-05-17 01:24 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-05-17 01:24 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-17 01:24 UTC -
web:security.paloaltonetworks.com
Palo Alto Networks Security Advisory: CVE-2026-0265 PAN-OS: Authentication Bypass with Cloud Authentication Service (CAS) enabled An authentication bypass vulnerability in Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to bypass authentication controls when Cloud Authentication Service (CAS) is enabled. The risk is higher if CAS is enabled on the ...
2026-05-17 01:24 UTC -
web:stack.watch
Products Associated with CVE-2026-0265 Want to know whenever a new CVE is published for Palo Alto Networks PAN-OS? stack.watch will email you.
2026-05-17 01:24 UTC -
web:windowsreport.com
Microsoft has released its May 2026 Patch Tuesday updates for Windows 11 and Windows 10, shipping as KB5089549 and KB5087544. The updates include fixes for more than 130 security vulnerabilities across Windows, Office, SharePoint, DNS components, and core system services, as Bleeping Computer writes. While no publicly disclosed zero-day vulnerabilities were reported this month, the […]
2026-05-17 01:24 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.
2026-05-17 01:24 UTC -
web:www.rapid7.com
On May 13, 2026 , Palo Alto Networks published an advisory for an authentication bypass affecting some configurations of PAN-OS on PA-Series and VM-Series firewalls, as well as Panorama (virtual and M-Series) appliances. The researchers that reported the vulnerability have indicated the impact of exploitation is critical.
2026-05-17 01:24 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-0265.json.
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"value": "<p>Customers are impacted if the following conditions are true:</p><ol><li>Authentication Profile with CAS is enabled <b>and</b></li><li>Authentication profile is attached to a login interface.</li></ol><p>To verify if you have CAS enabled, see our documentation on <a target=\"_blank\" rel=\"nofollow\" href=\"https://docs.paloaltonetworks.com/ngfw/help/10-2/device/device-authentication-profile/configure-an-authentication-profile\">authentication profile in management interface</a>. </p><p>To verify if the CAS authentication profile is attached to your configurations in the PAN-OS management interface:</p><ol><li>Navigate to <b>Device</b> > <b>Setup</b> > <b>Management</b> > <b>Authentication Settings</b> > <b>Authentication Profile</b>.</li><li>Navigate to <b>Device > User Identification > Authentication Portal Settings</b>.</li><li>Navigate to <b>Network > Gateways > GlobalProtect Gateway Configuration</b>.</li><li>Navigate to <b>Network > Portals > GlobalProtect Portal Configuration</b>.</li></ol><div><p>To verify if the CAS authentication profile is attached to your configurations in the SCM profile:</p><ol><li>Navigate to <b>Configuration > NGFW and Prisma Access</b> in the SCM profile. Go to <b>Identity Services > Authentication > Authentication Profile</b>. </li><li>Navigate to <b>Device > Device Setup > Authentication and Accounting Settings > Authentication profile</b>, and confirm the attached profile is set to CAS as auth method.</li></ol></div>"
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"value": "<p>An authentication bypass vulnerability in Palo Alto Networks PAN-OS\u00ae software enables an unauthenticated attacker with network access to bypass authentication controls when Cloud Authentication Service (CAS) is enabled.</p><p>The risk is higher if CAS is enabled on the management interface and lower when any other login interfaces are used.<br><br>The risk of this issue is greatly reduced if you secure access to the management web interface by restricting access to only trusted internal IP addresses according to our recommended <a target=\"_blank\" rel=\"nofollow\" href=\"https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431\">best practice deployment guidelines</a>.<br><br>This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series).<br><br>Cloud NGFW and Prisma Access<b><span>\u00ae</span></b> are not impacted by this vulnerability.</p>"
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"value": "An authentication bypass vulnerability in Palo Alto Networks PAN-OS\u00ae software enables an unauthenticated attacker with network access to bypass authentication controls when Cloud Authentication Service (CAS) is enabled.\n\n\n\nThe risk is higher if CAS is enabled on the management interface and lower when any other login interfaces are used.\n\nThe risk of this issue is greatly reduced if you secure access to the management web interface by restricting access to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 .\n\nThis issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series).\n\nCloud NGFW and Prisma Access\u00ae are not impacted by this vulnerability."
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"value": "<table class=\"tbl\"><thead><tr><th>Version</th><th>Minor Version Range</th><th>Suggested Solution</th></tr></thead><tbody><tr><td>Cloud NGFW</td><td><br></td><td>No action needed.</td></tr><tr><td>PAN-OS 12.1</td><td>12.1.5 through 12.1.6</td><td>Upgrade to 12.1.7 or later.</td></tr><tr><td><br></td><td>12.1.2 through 12.1.4-h*</td><td>Upgrade to 12.1.4-h5 or 12.1.7 or later.</td></tr><tr><td>PAN-OS 11.2</td><td>11.2.11 or later</td><td>Upgrade to 11.2.12 or later.</td></tr><tr><td><br></td><td>11.2.8 through 11.2.10-h*</td><td>Upgrade to 11.2.10-h6 or 11.2.12 or later.</td></tr><tr><td><br></td><td>11.2.5 through 11.2.7-h*</td><td>Upgrade to 11.2.7-h13 or 11.2.12 or later.</td></tr><tr><td><br></td><td>11.2.0 through 11.2.4-h*</td><td>Upgrade to 11.2.4-h17 or 11.2.12 or later.</td></tr><tr><td>PAN-OS 11.1</td><td>11.1.14 or later</td><td>Upgrade to 11.1.15 or later.</td></tr><tr><td><br></td><td>11.1.11 through 11.1.13-h*</td><td>Upgrade to 11.1.13-h5 or 11.1.15 or later.</td></tr><tr><td><br></td><td>11.1.8 through 11.1.10-h*</td><td>Upgrade to 11.1.10-h25 or 11.1.15 or later.</td></tr><tr><td><br></td><td>11.1.7 through 11.1.7-h*</td><td>Upgrade to 11.1.7-h6 or 11.1.15 or later.</td></tr><tr><td><br></td><td>11.1.5 through 11.1.6-h*</td><td>Upgrade to 11.1.6-h32 or 11.1.15 or later.</td></tr><tr><td><br></td><td>11.1.0 through 11.1.4-h*</td><td>Upgrade to 11.1.4-h33 or 11.1.15 or later.</td></tr><tr><td>PAN-OS 10.2</td><td>10.2.17 through 10.2.18-h*</td><td>Upgrade to 10.2.18-h6 or later.</td></tr><tr><td><br></td><td>10.2.14 through 10.2.16-h*</td><td>Upgrade to 10.2.16-h7 or 10.2.18-h6 or later.</td></tr><tr><td><br></td><td>10.2.11 through 10.2.13-h*</td><td>Upgrade to 10.2.13-h21 or 10.2.18-h6 or later.</td></tr><tr><td><br></td><td>10.2.8 through 10.2.10-h*</td><td>Upgrade to 10.2.10-h36 or 10.2.18-h6 or later.</td></tr><tr><td><br></td><td>10.2.0 through 10.2.7-h*</td><td>Upgrade to 10.2.7-h34 or 10.2.18-h6 or later.</td></tr><tr><td>All older <br>unsupported <br>PAN-OS versions</td><td><br></td><td>Upgrade to a supported fixed version.</td></tr><tr><td>Prisma Access</td><td><br></td><td>No action needed.</td></tr></tbody></table>"
}
],
"value": "VERSION MINOR VERSION RANGE SUGGESTED SOLUTION\nCloud NGFW No action needed.\nPAN-OS 12.1 12.1.5 through 12.1.6 Upgrade to 12.1.7 or later.\n 12.1.2 through 12.1.4-h* Upgrade to 12.1.4-h5 or 12.1.7 or later.\nPAN-OS 11.2 11.2.11 or later Upgrade to 11.2.12 or later.\n 11.2.8 through 11.2.10-h* Upgrade to 11.2.10-h6 or 11.2.12 or later.\n 11.2.5 through 11.2.7-h* Upgrade to 11.2.7-h13 or 11.2.12 or later.\n 11.2.0 through 11.2.4-h* Upgrade to 11.2.4-h17 or 11.2.12 or later.\nPAN-OS 11.1 11.1.14 or later Upgrade to 11.1.15 or later.\n 11.1.11 through 11.1.13-h* Upgrade to 11.1.13-h5 or 11.1.15 or later.\n 11.1.8 through 11.1.10-h* Upgrade to 11.1.10-h25 or 11.1.15 or later.\n 11.1.7 through 11.1.7-h* Upgrade to 11.1.7-h6 or 11.1.15 or later.\n 11.1.5 through 11.1.6-h* Upgrade to 11.1.6-h32 or 11.1.15 or later.\n 11.1.0 through 11.1.4-h* Upgrade to 11.1.4-h33 or 11.1.15 or later.\nPAN-OS 10.2 10.2.17 through 10.2.18-h* Upgrade to 10.2.18-h6 or later.\n 10.2.14 through 10.2.16-h* Upgrade to 10.2.16-h7 or 10.2.18-h6 or later.\n 10.2.11 through 10.2.13-h* Upgrade to 10.2.13-h21 or 10.2.18-h6 or later.\n 10.2.8 through 10.2.10-h* Upgrade to 10.2.10-h36 or 10.2.18-h6 or later.\n 10.2.0 through 10.2.7-h* Upgrade to 10.2.7-h34 or 10.2.18-h6 or later.\nAll older Upgrade to a supported fixed version.\nunsupported\nPAN-OS versions\nPrisma Access No action needed."
}
],
"source": {
"discovery": "EXTERNAL"
},
"timeline": [
{
"lang": "en",
"time": "2026-05-13T16:00:00.000Z",
"value": "Initial Publication."
}
],
"title": "PAN-OS: Authentication Bypass with Cloud Authentication Service (CAS) enabled",
"workarounds": [
{
"lang": "eng",
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"value": "<p>The vast majority of firewalls already follow Palo Alto Networks' and industry best practices. However, if you haven\u2019t already, we strongly recommend that you secure access to your management interface according to our best practice deployment guidelines. Specifically, you should restrict access to the management interface to only trusted internal IP addresses to prevent external access from the internet.<br><br>Review information about how to secure management access to your Palo Alto Networks firewalls:</p><ul><li>Palo Alto Networks LIVEcommunity article: <a target=\"_blank\" rel=\"nofollow\" href=\"https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431\">https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431</a></li><li>Palo Alto Networks official and more detailed technical documentation: <a target=\"_blank\" rel=\"nofollow\" href=\"https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices\">https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices</a> </li></ul><p>To temporarily mitigate this issue, customers can disable the Cloud Authentication Service (CAS) by changing the associated authentication profile to SAML, RADIUS, or other supported authentication methods.</p><p>Customers with a Threat Prevention subscription can block attacks for this vulnerability by enabling Threat ID 510008 from Applications and Threats content version 9100-10044 and later. Threat ID 510008 depends on features present in PAN-OS 11.2 and above.</p><span>To ensure the Threat ID provides effective protection against this vulnerability, follow these steps</span>:<br><ul><li><a target=\"_blank\" rel=\"nofollow\" href=\"https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#id59206398-3dab-4b2f-9b4b-7ea500d036ba\">Route incoming traffic for the MGT port through a DP port</a>, e.g., enabling management profile on a DP interface for management access. </li><li>Ensure that <a target=\"_blank\" rel=\"nofollow\" href=\"https://live.paloaltonetworks.com/t5/globalprotect-articles/applying-vulnerability-protection-to-globalprotect-interfaces/ta-p/340184\">vulnerability protection security profile is applied to your GlobalProtect interface</a>. </li><li><a target=\"_blank\" rel=\"nofollow\" href=\"https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#id112f7714-8995-4496-bbf9-781e63dec71c\">Replace the default certificate for Inbound Traffic Management</a>. </li><li><a target=\"_blank\" rel=\"nofollow\" href=\"https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#idbbd82587-17a2-42b4-9245-d3714e1e13a2\">Decrypt inbound traffic to the management interface so the firewall can inspect it</a>. </li><li>Enable Threat Prevention on the inbound traffic to management services.</li></ul>"
}
],
"value": "The vast majority of firewalls already follow Palo Alto Networks' and industry best practices. However, if you haven\u2019t already, we strongly recommend that you secure access to your management interface according to our best practice deployment guidelines. Specifically, you should restrict access to the management interface to only trusted internal IP addresses to prevent external access from the internet.\n\nReview information about how to secure management access to your Palo Alto Networks firewalls:\n\n * Palo Alto Networks LIVEcommunity article: https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431\n * Palo Alto Networks official and more detailed technical documentation: https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices \n\nTo temporarily mitigate this issue, customers can disable the Cloud Authentication Service (CAS) by changing the associated authentication profile to SAML, RADIUS, or other supported authentication methods.\n\nCustomers with a Threat Prevention subscription can block attacks for this vulnerability by enabling Threat ID 510008 from Applications and Threats content version 9100-10044 and later. Threat ID 510008 depends on features present in PAN-OS 11.2 and above.\n\nTo ensure the Threat ID provides effective protection against this vulnerability, follow these steps:\n\n * Route incoming traffic for the MGT port through a DP port (https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#id59206398-3dab-4b2f-9b4b-7ea500d036ba), e.g., enabling management profile on a DP interface for management access. \n * Ensure that vulnerability protection security profile is applied to your GlobalProtect interface (https://live.paloaltonetworks.com/t5/globalprotect-articles/applying-vulnerability-protection-to-globalprotect-interfaces/ta-p/340184). \n * Replace the default certificate for Inbound Traffic Management (https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#id112f7714-8995-4496-bbf9-781e63dec71c). \n * Decrypt inbound traffic to the management interface so the firewall can inspect it (https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#idbbd82587-17a2-42b4-9245-d3714e1e13a2). \n * Enable Threat Prevention on the inbound traffic to management services."
}
],
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"cveMetadata": {
"assignerOrgId": "d6c1279f-00f6-4ef7-9217-f89ffe703ec0",
"assignerShortName": "palo_alto",
"cveId": "CVE-2026-0265",
"datePublished": "2026-05-13T17:38:33.822Z",
"dateReserved": "2025-11-03T20:44:25.538Z",
"dateUpdated": "2026-05-14T10:31:44.019Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}