EUVD-2026-73016
GHSA-fv37-h825-2cj8
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access only, high complexity race/heap precondition, low-privilege caller required; full CIA impact on local system with unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in the Windows Program Compatibility Assistant (PCA) Service enables a locally authenticated, low-privileged attacker to escalate privileges on the local machine. The flaw spans an exceptionally broad range of Windows client and server releases - from Windows 10 version 1607 through Windows 11 26H1 and Windows Server 2016 through 2025. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must already hold a low-privileged (PR:L) local interactive or network session on the affected Windows system - a standard user account suffices. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 score with vector AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H accurately reflects a meaningful but non-trivial local privilege escalation. … 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 security updates released for CVE-2026-69563, available through Windows Update, WSUS, and the Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an immediate inventory of all Windows 10 (version 1607 or later), Windows 11 (through build 26H1), and Windows Server 2016 through 2025 systems, and check their current patch levels via your endpoint management tool. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today