CVE-2025-54115: Microsoft Windows 10 Version 1809 · Race Condition
Affects Microsoft Windows 10 Version 1809Source CVE Database V5
Not known to be exploited · CVSS 7.0 High.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CExploitation evidence
Disclosed: evidence found.
CVE published 9 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows 10 Version 1809 | Affected
| Fixed in– |
AI-suggested
1. Restrict local access to systems running Windows 10 Version 1809 with Hyper-V enabled, ensuring only trusted users have login privileges. 2. Disable Hyper-V if virtualization is not required, reducing the attack surface. 3. Implement strict access controls and monitoring on Hyper-V hosts to detect unusual privilege escalation attempts or race condition exploitation patterns. 4. Use endpoint detection and response (EDR) solutions capable of identifying suspicious local privilege escalation behaviors. 5. Apply principle of least privilege to limit the permissions of local users and service accounts. 6. Regularly audit and review system logs for anomalies related to Hyper-V operations and resource contention. 7. Prepare for patch deployment by tracking updates from Microsoft, as no patches are currently available. 8. Consider upgrading to a supported Windows version with active security updates if feasible, as Windows 10 Version 1809 is an older release. 9. Employ virtualization security best practices, including network segmentation and isolation of Hyper-V hosts to contain potential breaches.
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54115 (opens in a new tab)
- vicarius.io/vsociety/posts/cve-2025-54115-detection-script-privilege-elevation-vulnerability-in-windows-hyper-v (opens in a new tab)
- vicarius.io/vsociety/posts/cve-2025-54115-mitigation-script-privilege-elevation-vulnerability-in-windows-hyper-v (opens in a new tab)