EUVD-2026-73011
GHSA-xmh2-57w7-gqc9
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector with low-privilege user requirement; PCA runs by default, so AC:L; full local system compromise upon success.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Improper neutralization of special elements used in a command ('command injection') in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Command injection in the Windows Program Compatibility Assistant (PCA) Service enables local privilege escalation across a broad range of Windows 10, Windows 11, and Windows Server editions. An authenticated low-privilege attacker can inject shell commands through the PCA service's unsanitized input handling (CWE-77), achieving full control of the local system with C:H/I:H/A:H impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated low-privilege local user account on an affected Windows host (PR:L, AV:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score is internally consistent: AV:L reflects that network-remote exploitation is not possible without prior local access, PR:L confirms a standard domain or local user account suffices, and AC:L signals no race conditions or special configuration dependencies. … 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 cumulative update that delivers the patched builds listed in the affected-versions data: Windows 10 1607/Server 2016 to build 10.0.14393.9512 or later, Windows 10 1809/Server 2019 to 10.0.17763.9245 or later, 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 to 10.0.26100.33438 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Conduct asset inventory of all Windows 10, 11, and Server systems to establish patch baseline and prioritize critical infrastructure. …
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Same weakness CWE-77 – Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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