CVE-2026-83839
Time-of-check time-of-use (toctou) race condition in Windows Hyper-V allows an authorized attacker…
- Risk score
- 49/100
- CVSS
- 7.0 v3.1
- Exploit chance (30 days)
- 0.2%
- Published
- 13 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Time-of-check time-of-use (toctou) race condition in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
- Affected
- Microsoft
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.0 high
- Named in a government or vendor bulletin
Government and vendor bulletins
References
Original description
Time-of-check time-of-use (toctou) race condition in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
Last activity 20 Oct 2026. Patch Forecast updates every hour.