High severity · published Jul 8, 2025
CVE-2025-49735
Use after free in Windows KDC Proxy Service (KPSSVC) allows an unauthorized attacker to execute code over a network
8.1
CVSS
1.2%
EPSS
No
On KEV
Description
Use after free in Windows KDC Proxy Service (KPSSVC) allows an unauthorized attacker to execute code over a network.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WS
Windows Server 2012 · Microsoft
r2 · source: NVD
WS
Windows Server 2016 · Microsoft
before 10.0.14393.8148 · source: NVD
WS
Windows Server 2019 · Microsoft
before 10.0.17763.7434 · source: NVD
WS
Windows Server 2022 · Microsoft
before 10.0.20348.3807 · source: NVD
WS
Windows Server 2022 23h2 · Microsoft
before 10.0.25398.1665 · source: NVD
WS
Windows Server 2025 · Microsoft
before 10.0.26100.4349 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-49735
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-49735
Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49735
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