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CVE-2025-33071 · Windows KDC Proxy Service (KPSSVC) Remote Code Execution Vulnerability

Use after free in Windows KDC Proxy Service (KPSSVC) allows an unauthorized attacker to execute code over a network.

Severity
Critical
Impact
Remote Code Execution
CVSS
8.1 base · 7.1 temporal
Release
2025-06-10
Signals
Windows KDC Proxy Service (KPSSVC) Remote Code Execution Exploited: No Publicly disclosed: No Exploitability: Exploitation More Likely
CWE
CWE-416: Use After Free
Patch Diff
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Description
Use after free in Windows KDC Proxy Service (KPSSVC) allows an unauthorized attacker to execute code over a network.
FAQ / Articles
FAQ
How could an attacker exploit this vulnerability? An unauthenticated attacker could use a specially crafted application to leverage a cryptographic protocol vulnerability in Kerberos Key Distribution Center Proxy Service to perform remote code execution against the target.
Windows KDC Proxy Service (KPSSVC) Remote Code Execution Vulnerability
Use after free in Windows KDC Proxy Service (KPSSVC) allows an unauthorized attacker to execute code over a network.
FAQ
Are all Windows Servers affected by this vulnerability? This vulnerability only affects Windows Servers that are configured as a [MS-KKDCP]: Kerberos Key Distribution Center (KDC) Proxy Protocol server. Domain controllers are not affected.
FAQ
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to win a race condition.