CVE-2026-70064: Windows Kerberos Elevation of Privilege Vulnerability
Integer underflow (wrap or wraparound) in Windows Kerberos allows an authorized attacker to elevate privileges locally.
Other sources
Windows Kerberos Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
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Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
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Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
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Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
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Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
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Fixed in 10.0.26300.9711Patch KB5127648
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must already be authorized on the affected system and have local access. The vulnerability is therefore most relevant where untrusted or lower-privileged users can log on to affected Windows endpoints or servers.
Does exploitation require user interaction or network access?
No user interaction is required. The supplied severity vector indicates local attack vector access, so the attacker needs local access rather than remote network reachability.
What is the likely impact if exploitation succeeds?
Successful exploitation can elevate the attacker's privileges. The provided vector rates confidentiality, integrity, and availability impacts as high.
Which systems should be assessed?
Assess Microsoft Windows 10, Windows 11, and Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025 systems. The provided data does not identify specific affected build or patch versions.