CVE-2026-96939
7.0HighPublished 13 Oct 2026 · NVD status: Undergoing Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
- Impact
- Full C/I/A compromise
- Weakness
- CWE-367
Impact
A local authenticated attacker can elevate their privileges to SYSTEM. They need existing local account access to exploit the timing window.
Root cause
A time-of-check to time-of-use (TOCTOU) race condition exists in the Windows Servicing Stack Update component.
Affected systems
Versions not listed — check the vendor advisory.
CVSS v3.1 · CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Fix & remediation
Install the latest Servicing Stack Update (SSU) or cumulative update from Microsoft; no workarounds are provided.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
Time-of-check time-of-use (toctou) race condition in Servicing Stack Updates allows an authorized attacker to elevate privileges locally.