EUVD-2026-29575
GHSA-c5mq-9w9m-247v
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Local-only attack (AV:L) requiring low-privilege authentication (PR:L); partial C/I impact from security feature bypass with no availability effect.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
Improper access control in Windows Filtering Platform (WFP) allows an authorized attacker to bypass a security feature locally.
AnalysisAI
Windows Filtering Platform (WFP) on affected Windows 10, Windows 11, and Windows Server releases exposes an improper access control flaw (CWE-284) that enables a locally authenticated, low-privileged attacker to bypass a host-based security feature. The bypass is limited to confidentiality and integrity impacts (no availability), scoped to the vulnerable system, and requires no user interaction once local execution is established. No public exploit code exists and CISA has not added this to the KEV catalog; EPSS at 0.04% (11th percentile) and SSVC exploitation status of 'none' corroborate the low probability of near-term opportunistic weaponization.
Technical ContextAI
Windows Filtering Platform is a native Windows subsystem that provides a set of APIs and kernel-mode callout drivers used to inspect, modify, and filter network traffic; it underpins Windows Firewall, IPsec, and third-party endpoint security products. The vulnerability maps to CWE-284 (Improper Access Control), indicating that WFP fails to enforce authorization boundaries consistently, allowing a process running with standard user privileges to manipulate or circumvent filtering rules or policy decisions that should be restricted to higher-privileged principals. Affected CPE strings span the cpe:2.3:a:microsoft:windows_10_* and cpe:2.3:a:microsoft:windows_11_* families as well as cpe:2.3:a:microsoft:windows_server_2012, covering a broad OS surface from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through Server 2025. The CVSS vector AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N confirms the attack is entirely local and requires only standard user-level privileges.
RemediationAI
The primary remediation is applying the vendor-released security update available through Microsoft Update and Windows Server Update Services (WSUS). Target build thresholds are confirmed per EUVD data: update Windows 10 21H2 to build 10.0.19044.7291 or later, Windows 10 22H2 to 10.0.19045.7291 or later, Windows 11 23H2/22H3 to 10.0.22631.7079 or later, Windows 11 24H2 to 10.0.26100.8457 or later, Windows Server 2019 to 10.0.17763.8755 or later, Windows Server 2022 to 10.0.20348.5139 or later, and Windows Server 2025 to 10.0.26100.32860 or later - with full version mapping at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32209. No vendor-published workaround is identified in the available references. If patching is delayed, compensating controls should focus on reducing local attacker foothold opportunities: enforcing least-privilege user accounts via Privileged Access Workstations (PAW), restricting interactive logon rights through Group Policy, and deploying application control (e.g., Windows Defender Application Control) to limit executable code running under low-privileged sessions. Note that these controls address the prerequisite (local code execution) rather than the WFP flaw itself and should not replace patching.
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
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