What’s Vulnerable › Vulnerabilities

CVE-2022-37966: Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-09 · updated 2026-08-10

Description

Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability

Affected products

• Fedoraproject Fedora: 36, 37
• Microsoft Windows Server 2008: r2-sp1
• Microsoft Windows Server 2012: r2
• Microsoft Windows Server 2016: all versions
• Microsoft Windows Server 2019: all versions
• Microsoft Windows Server 2022: all versions
• NetApp Management Services For Element Software: all versions
• NetApp Management Services For Netapp Hci: all versions
• Samba: before 4.15.13; from 4.16.0 before 4.16.8; from 4.17.0 before 4.17.4 — fixed in 4.15.13, 4.16.8, 4.17.4
• Microsoft Windows Server 2008 R2 Service Pack 1: all versions
• Microsoft Windows Server 2008 Service Pack 2: all versions
• Microsoft Windows Server 2012: all versions
• Microsoft Windows Server 2012 R2: all versions
• Microsoft Windows Server 2016: all versions
• Microsoft Windows Server 2019: all versions
• Microsoft Windows Server 2022: all versions

How to fix

Upgrade to a fixed version: Samba 4.15.13, 4.16.8, 4.17.4. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37966
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37966
• https://security.gentoo.org/glsa/202309-06

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