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Krb5: kerberos rc4-hmac-md5 checksum vulnerability enabling message spoofing via md5 collisions

🗓️ 04 Sep 2025 10:44:11Reported by MicrosoftType 
mscve
 mscve🔗 msrc.microsoft.com👁 2 Views

Kerberos vulnerability in RC4-HMAC-MD5 checksum enables message spoofing through collisions.

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21 Feb 2026 11:35Current
7High risk
Vulners AI Score7
CVSS 3.15.9
EPSS0.00252
SSVC
kerberos protocolchecksum vulnerabilitycollision exploitationmessage spoofing
2