Strix
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CVE-2026-27911

HIGHCVSS 7.8/10EPSS 0.15%

Last modified

CVE-2026-27911 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.. EPSS estimates a 0.15% chance of exploitation in the next 30 days.

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Probability
0.15%

4.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
MicrosoftWindows 10 1607< 10.0.14393.9060
MicrosoftWindows 10 1809< 10.0.17763.8644
MicrosoftWindows 10 21h2< 10.0.19044.7184
MicrosoftWindows 10 22h2< 10.0.19045.7184
MicrosoftWindows 11 23h2< 10.0.22631.6936
MicrosoftWindows 11 24h2< 10.0.26100.8246
MicrosoftWindows 11 25h2< 10.0.26200.8246
MicrosoftWindows 11 26h1< 10.0.28000.1836
MicrosoftWindows Server 2016< 10.0.14393.9060
MicrosoftWindows Server 2019< 10.0.17763.8644
MicrosoftWindows Server 2022< 10.0.20348.5020
MicrosoftWindows Server 2022 23h2< 10.0.25398.2274
MicrosoftWindows Server 2025< 10.0.26100.32690

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-27911?
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-27911?
CVE-2026-27911 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.15% probability of exploitation in the next 30 days.
How do I fix CVE-2026-27911?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-27911?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST