CVE-2026-83903
7.8HighPublished 13 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Impact
- Full C/I/A compromise
- Weakness
- CWE-122
Impact
A local attacker with standard user privileges can elevate to SYSTEM permissions. They need existing shell or code execution on the Windows host.
Root cause
A heap-based buffer overflow flaw exists in the Windows Direct Composition component.
Affected systems
Versions not listed — check the vendor advisory.
CVSS v3.1 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Fix & remediation
Install the relevant Microsoft Security Update referenced in the MSRC advisory; no workaround or interim mitigation is currently documented.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
Heap-based buffer overflow in Windows Direct Composition allows an authorized attacker to elevate privileges locally.