CVE-2026-24297: Windows Kerberos Security Feature Bypass Vulnerability

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-10 · updated 2026-06-19
Weakness: CWE-362

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Kerberos allows an unauthorized attacker to bypass a security feature over a network.

Affected products

Microsoft Windows 10 1607: before 10.0.14393.8957 — fixed in 10.0.14393.8957
Microsoft Windows 10: before 10.0.17763.8511 — fixed in 10.0.17763.8511
Microsoft Windows 10: before 10.0.19044.7058 — fixed in 10.0.19044.7058
Microsoft Windows 10: before 10.0.19045.7058 — fixed in 10.0.19045.7058
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: before 10.0.14393.8957 — fixed in 10.0.14393.8957
Microsoft Windows Server 2019: before 10.0.17763.8511 — fixed in 10.0.17763.8511
Microsoft Windows 10 1607: from 10.0.14393.0 before 10.0.14393.8957 — fixed in 10.0.14393.8957
Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.8511 — fixed in 10.0.17763.8511
Microsoft Windows 10: from 10.0.19044.0 before 10.0.19044.7058 — fixed in 10.0.19044.7058
Microsoft Windows 10: from 10.0.19045.0 before 10.0.19045.7058 — fixed in 10.0.19045.7058
Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.25973 — fixed in 6.2.9200.25973
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.23074 — fixed in 6.3.9600.23074
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.8957 — fixed in 10.0.14393.8957
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.8511 — fixed in 10.0.17763.8511

How to fix

Upgrade to a fixed version: Microsoft Windows 10 1607 10.0.14393.8957; Microsoft Windows 10 10.0.17763.8511; Microsoft Windows 10 10.0.19044.7058; Microsoft Windows 10 10.0.19045.7058; Microsoft Windows Server 2016 10.0.14393.8957; Microsoft Windows Server 2019 10.0.17763.8511; Microsoft Windows 10 1607 10.0.14393.8957; Microsoft Windows 10 10.0.17763.8511; Microsoft Windows 10 10.0.19044.7058; Microsoft Windows 10 10.0.19045.7058; Microsoft Windows Server 2012 6.2.9200.25973; Microsoft Windows Server 2012 R2 6.3.9600.23074. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24297

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