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Vulnerability · Published Sep 9, 2025 · Assigned by microsoft

CVE-2025-54895SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Elevation of Privilege Vulnerability

High 7.8

In plain English

A high-severity integer overflow in Windows 10 Version 1507 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.3%top 78.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Integer overflow or wraparound in Windows SPNEGO Extended Negotiation allows an authorized attacker to elevate privileges locally.

Affected products (as reported)

VendorProductVersions
Microsoft Windows 10 Version 1507 10.0.10240.0 – before 10.0.10240.21128
Microsoft Windows 10 Version 1607 10.0.14393.0 – before 10.0.14393.8422
Microsoft Windows 10 Version 1809 10.0.17763.0 – before 10.0.17763.7792
Microsoft Windows 10 Version 21H2 10.0.19044.0 – before 10.0.19044.6332
Microsoft Windows 10 Version 22H2 10.0.19045.0 – before 10.0.19045.6332
Microsoft Windows 11 version 22H2 10.0.22621.0 – before 10.0.22621.5909
Microsoft Windows 11 version 22H3 10.0.22631.0 – before 10.0.22631.5909
Microsoft Windows 11 Version 23H2 10.0.22631.0 – before 10.0.22631.5909
Microsoft Windows 11 Version 24H2 10.0.26100.0 – before 10.0.26100.6584
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.0 – before 6.1.7601.27929
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 – before 6.1.7601.27929
Microsoft Windows Server 2012 6.2.9200.0 – before 6.2.9200.25675
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 – before 6.2.9200.25675
Microsoft Windows Server 2012 R2 6.3.9600.0 – before 6.3.9600.22774
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 – before 6.3.9600.22774
Microsoft Windows Server 2016 10.0.14393.0 – before 10.0.14393.8422
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 – before 10.0.14393.8422
Microsoft Windows Server 2019 10.0.17763.0 – before 10.0.17763.7792
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 – before 10.0.17763.7792
Microsoft Windows Server 2022 10.0.20348.0 – before 10.0.20348.4171
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 – before 10.0.25398.1849
Microsoft Windows Server 2025 10.0.26100.0 – before 10.0.26100.6584
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 – before 10.0.26100.6584

Weakness: CWE-190, CWE-367 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

References