CVE-2025-21295

HIGH

Windows 10/11, Server 2008-2012 RCE via SPNEGO NEGOEX Use-After-Free

Title source: llm
STIX 2.1

Description

SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability

References (1)

Core 1
Core References
Patch, Vendor Advisory vendor-advisory patch
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21295

Scores

CVSS v3 8.1
EPSS 0.0171
EPSS Percentile 82.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-416
Status published
Products (16)
microsoft/windows_10_1507 < 10.0.10240.20890 (2 CPE variants)
microsoft/windows_10_1607 < 10.0.14393.7699 (2 CPE variants)
microsoft/windows_10_1809 < 10.0.17763.6775 (2 CPE variants)
microsoft/windows_10_21h2 < 10.0.19044.5371
microsoft/windows_10_22h2 < 10.0.19045.5371
microsoft/windows_11_22h2 < 10.0.22621.4751
microsoft/windows_11_23h2 < 10.0.22631.4751
microsoft/windows_11_24h2 < 10.0.26100.2894
microsoft/windows_server_2008 r2 sp1
microsoft/windows_server_2012
... and 6 more
Published Jan 14, 2025
Tracked Since Feb 18, 2026