EUVD-2026-73029
GHSA-cvqx-phhj-g6pm
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access and low-privilege account required; race condition exploitation (AC:H); full SYSTEM-level impact (C:H/I:H/A:H); no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Windows Notification allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Notification subsystem (CWE-416 use-after-free) affects Windows 10, Windows 11, and Windows Server 2022/2025 across a broad range of release builds. An authenticated low-privilege attacker who successfully exploits the race-condition-dependent memory corruption can achieve full SYSTEM-level control (C:H/I:H/A:H) without user interaction. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated low-privilege local account on the affected Windows system (PR:L in CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 vector (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects a realistic but non-trivial exploitation path: the attacker must already hold a foothold as a standard authenticated local user and must win a race condition, placing this firmly in the post-exploitation or insider-threat category. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Microsoft-released security update to bring affected systems to or above the patched build thresholds: Windows 10 21H2 to 10.0.19044.7725 or later, Windows 10 22H2 to 10.0.19045.7725 or later, Windows 11 23H2 to 10.0.22631.7582 or later, Windows 11 24H2 to 10.0.26100.9445 or later, Windows 11 25H2 to 10.0.26200.9445 or later, Windows 11 26H1 to 10.0.28000.2954 or later, Windows Server 2022 to 10.0.20348.5622 or later, and Windows Server 2025 (including Server Core) to 10.0.26100.33438 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all Windows 10, Windows 11, and Windows Server 2022/2025 systems in your environment and assess business criticality. …
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
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