EUVD-2026-73197
GHSA-gqg7-cmjw-g87g
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only UAF exploit requiring race-condition timing (AC:H), standard user credentials (PR:L), full SYSTEM-level impact with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Use after free in Windows Connected User Experiences and Telemetry allows an authorized attacker to elevate privileges locally.
AnalysisAI
Use-after-free in the Windows Connected User Experiences and Telemetry service (DiagTrack) enables a locally-authenticated low-privileged attacker to escalate privileges to SYSTEM-level access. The vulnerability affects a broad range of current Windows releases - Windows 10 21H2/22H2, Windows 11 23H2/24H2/25H2/26H1, Windows Server 2022, and Windows Server 2025 - all receiving patched builds via Microsoft's update cycle. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a locally-authenticated account with at minimum standard user (low) privileges on the target system; remote unauthenticated exploitation is not possible given AV:L/PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 7.0 reflects a genuine High-severity finding tempered by AC:H - the high-complexity requirement (likely a race condition in the UAF trigger) raises the exploitation bar above trivially scriptable attacks. … 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 vendor-released patches immediately via Windows Update or WSUS: Windows 10 21H2/22H2 to build 10.0.19044.7725 / 10.0.19045.7725 or later, Windows 11 23H2 to 10.0.22631.7582, Windows 11 24H2/Server 2025 to 10.0.26100.9445 or 10.0.26100.33438 respectively, Windows 11 25H2 to 10.0.26200.9445, Windows 11 26H1 to 10.0.28000.2954, and Windows Server 2022 to 10.0.20348.5622. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all systems running Windows 10 21H2/22H2, Windows 11 (23H2, 24H2, 25H2, 26H1), Windows Server 2022, or Windows Server 2025; verify WSUS or Microsoft Update infrastructure connectivity to all endpoints. …
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Same weakness CWE-416 – Use After Free
View allSame technique Privilege Escalation
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External POC / Exploit Code
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