Servicing Stack Updates Elevation of Privilege Vulnerability
CVE-2026-96939 · published 13 Oct 2026
How serious is it
- Severity: high, CVSS score 7 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-96939?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Microsoft Windows 11 version 23H2: 10.0.22631.0 to < 10.0.22631.7652
- Microsoft Windows 11 Version 23H2: 10.0.22631.0 to < 10.0.22631.7652
- Microsoft Windows 11 Version 24H2: 10.0.26100.0 to < 10.0.26100.9711
- Microsoft Windows 11 Version 25H2: 10.0.26200.0 to < 10.0.26200.9711
- Microsoft Windows 11 version 26H1: 10.0.28000.0 to < 10.0.28000.3231
- Microsoft Windows 11 Version 26H2: 10.0.26300.0 to < 10.0.26300.9711
- Microsoft Windows Server 2025: 10.0.26100.0 to < 10.0.26100.33650
- Microsoft Windows Server 2025 (Server Core installation): 10.0.26100.0 to < 10.0.26100.33650
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
Time-of-check time-of-use (toctou) race condition in Servicing Stack Updates allows an authorized attacker to elevate privileges locally.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
Merged from CVE List. Last updated 23 Oct 2026. All vulnerabilities · RSS · JSON