CVE-2026-42081
📛 CVE Title
(no title)
Description
Free5GC AMF Bypasses UE Security Capabilities on NGAP PathSwitchRequest
Description (MITRE) cveawg.mitre.org
Pulled from cveawg.mitre.org/api/cve/CVE-2026-42081 on 2026-07-01. Shown when MITRE's text differs from the cvelistV5 mirror.
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the AMF in Free5GC does not verify the UE Security Capabilities received in NGAP PathSwitchRequest messages against its locally stored values, as mandated by 3GPP TS 33.501 §6.7.3.1. A malicious gNB can overwrite the AMF's stored UE security capabilities with arbitrary values, which are then propagated in PathSwitchRequest Acknowledge messages and subsequent Handover Request messages. This leads to persistent handover denial-of-service for affected UEs. This vulnerability is fixed in 4.2.2.
Overview
- State
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- Assigner (CNA)
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- CVSS severity
- medium
- CVSS score
- 6.1 / 10
- CVSS vector
AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L- Effective score
- 6.1 / 10 MEDIUM source: CNA overview
- CWE(s)
- —
- Reserved
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- Published
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- Last updated
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- Source
- https://www.tenable.com/cve/CVE-2026-42081
- Linked Threat
- CVE-2026-42081 — CVE-2026-42081
NVD / KEV / EPSS data refreshed 2026-05-25 00:02 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-2026-32557
EUVD enrichment is queued; refresh the page in a few seconds.
Vendor references (0)
References embedded in the original CVE record by the assigning CNA.
None in the CVE record.
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://github.com/free5gc/free5gc/security/advisories/GHSA-77x9-rf64-92gv tenable:github.com
- https://www.first.org/epss/ tenable:www.first.org
- https://nvd.nist.gov/vuln/detail/CVE-2026-42081 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-42081 tenable:www.cve.org
Remediations (19)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
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web:blog.gridinsoft.com
Microsoft has confirmed exploitation of two Microsoft Defender vulnerabilities fixed in the May 2026 security update cycle. CVE - 2026 -41091 is an elevation-of-privilege flaw in the Microsoft Malware Protection Engine, while CVE - 2026 -45498 is a denial-of-service flaw in the Microsoft Defender Antimalware Platform . The first bug matters more for incident response because a local authorized ...
2026-05-26 03:06 UTC -
web:blog.qualys.com
With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.
2026-05-26 03:06 UTC -
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 .
2026-05-26 03:06 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 ...
2026-05-26 03:06 UTC -
web:learn.microsoft.com
In this library you will find the following security documents that have been released by the Microsoft Security Response Center (MSRC). The MSRC investigates all reports of security vulnerabilities affecting Microsoft products and services, and releases these documents as part of the ongoing effort to help you manage security risks and help keep your systems protected. Please use the ...
2026-05-26 03:06 UTC -
web:thecyberexpress.com
Microsoft confirms active exploitation of CVE - 2026 -41091 and CVE - 2026 -45498 in Defender, with CVSS-rated risks, KEV listing, and urgent patches issued.
2026-05-26 03:06 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's March 2026 Patch Tuesday with security updates for 79 flaws, including 2 publicly disclosed zero-day vulnerabilities.
2026-05-26 03:06 UTC -
web:www.bugcrowd.com
Vulnerability mitigation is typically considered a temporary or interim solution. While mitigation measures can reduce the immediate risk associated with vulnerabilities, they may not provide a permanent fix . Organizations should aim to prioritize and plan for complete vulnerability remediation whenever feasible and allocate resources accordingly.
2026-05-26 03:06 UTC -
web:www.cisecurity.org
<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...
2026-05-26 03:06 UTC -
web:www.csoonline.com
Microsoft released emergency fixes for two zero-day vulnerabilities in the malware protection components of Microsoft Defender. The flaws allow local attackers to gain system-level privileges or ...
2026-05-26 03:06 UTC -
web:access.redhat.com
The mitigation methods below address both vulnerabilities that affect Red Hat products — CVE - 2026 -43284 (IPsec ESP) and CVE - 2026 -46300 (XFRM ESP-in-TCP). CVE - 2026 -43500 (rxrpc) does not affect Red Hat products and requires no mitigation .
2026-06-03 22:31 UTC -
web:blog.gridinsoft.com
CVE - 2026 -41089 in Windows Netlogon is now reported as actively exploited. Patch domain controllers and check LSASS, Netlogon, and authentication logs.
2026-06-03 22:31 UTC -
web:msrc.microsoft.com
Security Update Guide - Microsoft Security Response Center
2026-06-03 22:31 UTC -
web:support.microsoft.com
This Hotpatch update for Windows 11, version 25H2 and 24H2 (KB5089466) includes security improvements. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates. To ...
2026-06-03 22:31 UTC -
web:thecyberexpress.com
Microsoft has rolled out its May 2026 Patch Tuesday security updates, delivering fixes for approximately 120 vulnerabilities across Windows, Microsoft Office, networking
2026-06-03 22:31 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's May 2026 Patch Tuesday, with security updates for 120 flaws and no zero-days disclosed this month.
2026-06-03 22:31 UTC -
web:www.cve.org
At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures
2026-06-03 22:31 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.
2026-06-03 22:31 UTC -
web:www.patch.moe
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2026-06-03 22:31 UTC
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