CVE-2026-0259
📛 CVE Title
WildFire WF-500 and WF-500-B: Arbitrary File Read and Delete Vulnerability in WildFire Appliance (WF-500, WF-500-B)
Description
An arbitrary File Read and Delete Vulnerability in Palo Alto Networks WildFire® WF-500 and WF-500-B appliances enables users to read sensitive information and delete arbitrary files. This vulnerability affects WF-500 and WF-500-B appliances running in the default non-FIPS configuration mode. The WildFire Appliance (WF-500, WF-500-B) software update is now available to customers that use the WildFire Appliance (WF-500, WF-500-B) for on-premise sandboxing. Please note that customers using the WildFire Public cloud service are NOT impacted by this vulnerability.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- palo_alto
- CVSS severity
- MEDIUM
- CVSS score
- 5.0 / 10
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/AU:Y/R:U/V:C/RE:M/U:Amber- Effective score
- 5.0 / 10 MEDIUM source: CNA overview
- CWE(s)
-
CWE-73 - Reserved
- 2025-11-03
- Published
- 2026-05-13 18:05 UTC
- Last updated
- 2026-05-13 18:57 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/0xxx/CVE-2026-0259.json
- Linked Threat
- CVE-2026-0259 — WildFire WF-500 and WF-500-B: Arbitrary File Read and Delete Vulnerability in WildFire Appliance (WF-500, WF-500-B)
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 19:17:01 UTC
- NVD last modified
- 2026-05-14 16:21:23 UTC
- EPSS score
- 0.0006 (probability of exploitation in next 30 days)
- EPSS percentile
- 17.47% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 04:50 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-2026-30106 - Assigner
- palo_alto
- Published
- May 13, 2026, 6:05:45 PM
- Updated
- May 13, 2026, 6:57:18 PM
- EUVD base score (CVSS 4.0)
-
5.0 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/AU:Y/R:U/V:C/RE:M/U:Amber - EUVD-reported EPSS
- 0.0600
- Vendors
- Palo Alto Networks
- Products
-
WildFire WF-500 and WF-500-B (11.1.0 <11.1.13,11.1.10-h8)WildFire WF-500 and WF-500-B (10.2.0 <10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34)WildFire WF-500 and WF-500-B (11.2.0 <11.2.11,11.2.7-h7)WildFire WF-500 and WF-500-B (12.1.0 <12.1.7, 12.1.4-h5)
ENISA description: An arbitrary File Read and Delete Vulnerability in Palo Alto Networks WildFire® WF-500 and WF-500-B appliances enables users to read sensitive information and delete arbitrary files. This vulnerability affects WF-500 and WF-500-B appliances running in the default non-FIPS configuration mode. The WildFire Appliance (WF-500, WF-500-B) software update is now available to customers that use the WildFire Appliance (WF-500, WF-500-B) for on-premise sandboxing. Please note that customers using the WildFire Public cloud service are NOT impacted by this vulnerability.
EUVD references (1)
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Palo Alto Networks | WildFire WF-500 and WF-500-B |
12.1.0 (affected),
11.2.0 (affected),
11.1.0 (affected),
10.2.0 (affected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
- https://security.paloaltonetworks.com/CVE-2026-0259 vendor-advisory
Web references (4)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://nvd.nist.gov/vuln/detail/CVE-2026-0259 tenable:nvd.nist.gov
- https://security.paloaltonetworks.com/CVE-2026-0259 tenable:security.paloaltonetworks.com
- https://www.cve.org/CVERecord?id=CVE-2026-0259 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
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-2026-0259 psirt@paloaltonetworks.com
Indicators (1)
IOCs linked to the auto-promoted Threat row.
| Type | Value | VirusTotal | Attached |
|---|---|---|---|
| cve |
CVE-2026-0259
|
no local data | 2026-05-14 09:33 UTC |
Remediations (14)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:cyberpress.org
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .
2026-05-23 21:35 UTC -
web:cybersecuritynews.com
Microsoft released its March 2026 Patch Tuesday security update on March 10, 2026 , addressing 78 vulnerabilities across Windows, Microsoft Office, Azure, SQL Server, and .NET. The update includes one actively exploited zero-day vulnerability and multiple Critical-rated flaws demanding immediate attention from security teams. The most urgent fix this month is CVE - 2026 -21262, the sole zero-day ...
2026-05-23 21:35 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.
2026-05-23 21:35 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's February 2026 Patch Tuesday with security updates for 58 flaws, including 6 actively exploited and three publicly disclosed zero-day vulnerabilities.
2026-05-23 21:35 UTC -
web:www.crowdstrike.com
Microsoft's February 2026 Patch Tuesday addresses 59 CVEs , featuring six exploited vulnerabilities, three of which were publicly known, and five Critical vulnerabilities.
2026-05-23 21:35 UTC -
web:www.manageengine.com
Unfold what this Patch Tuesday has in store for you Patch Tuesday, the unofficial term for Microsoft's scheduled security fix release on every second Tuesday of a month, has been a constant topic of discussion ever since its inception. Upcoming Webinar May 14,2026 11:30 EDT & 6:30 a.m. GMT Agenda of the Free Patch Tuesday webinar A complete breakdown of all the latest Patch Tuesday updates ...
2026-05-23 21:35 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-23 21:35 UTC -
web:www.vulncheck.com
In February, VulnCheck introduced our 2025 Routinely Targeted Vulnerabilities list, a compilation of CVEs researched and exploited by a range of threat actors in 2025. Today, we're releasing a list of 2026 vulnerabilities that our analysts have determined qualify for "Routinely Targeted" status based on a combination of threat actor, ransomware, and botnet targeting, along with public ...
2026-05-23 21:35 UTC -
web:www.windowslatest.com
Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.
2026-05-23 21:35 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-23 21:35 UTC -
web:blog.stefan-gossner.com
Important: If your current farm patch level is September 2025 CU, execute the following PowerShell script to correct the folder permissions on the relevant folders otherwise installing the SharePoint fixes will fail: Fix -SeptemberCU-Permission-Problem.ps1 Alternatively you can also remove the NT Authority\system account from WSS_WPG and IIS_IUSRS local security groups of the SharePoint ...
2026-05-17 01:54 UTC -
web:thehackernews.com
Microsoft patches 59 vulnerabilities, including six actively exploited zero-days, with CISA mandating urgent federal remediation .
2026-05-17 01:54 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 01:54 UTC -
web:www.linkedin.com
Microsoft has released its May 2026 Patch Tuesday security updates, addressing more than 130 vulnerabilities across its software ecosystem, including Windows, Microsoft Office, SharePoint Server ...
2026-05-17 01:54 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-0259.json.
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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>WildFire WF-500 and WF-500-B 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>WildFire WF-500 and WF-500-B 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>WildFire WF-500 and WF-500-B 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>WildFire WF-500 and WF-500-B 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>WildFire WF-500 and WF-500-B 10.1<br></td><td> All (EoL)</td><td>No fix planned. Upgrade to a supported version.</td></tr></tbody></table>"
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"title": "WildFire WF-500 and WF-500-B: Arbitrary File Read and Delete Vulnerability in WildFire Appliance (WF-500, WF-500-B)",
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"datePublished": "2026-05-13T18:05:45.862Z",
"dateReserved": "2025-11-03T20:44:19.922Z",
"dateUpdated": "2026-05-13T18:57:18.638Z",
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