CVE-2025-54895

SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Elevation of Privilege Vulnerability

En bref

Sévérité: HIGH 7.8
EPSS: EPSS 0.29 % · centile 21 (2026-10-27)
État: PUBLISHED
Publiée: 2025-09-09
Mise à jour: 2026-02-20
Attribuée par: microsoft
Statut NVD: Analyzed

Description

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

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	HIGH 7.8	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	microsoft
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H	NVD · secure@microsoft.com (Secondary)

Faiblesses (CWE)

Références européennes

ENISA EUVD · EUVD-2025-27360
GCVE · GCVE-0-2025-54895

Avis du CERT-FR

CERTFR-2025-AVI-0778 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr

Configurations affectées (CPE NVD)

cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:* < 10.0.10240.21128
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:* < 10.0.10240.21128
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* < 10.0.14393.8422
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* < 10.0.14393.8422
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* < 10.0.17763.7792
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* < 10.0.17763.7792
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:* < 10.0.19044.6332
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:* < 10.0.19045.6332
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:* < 10.0.22621.5909
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:* < 10.0.22631.5909
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:* < 10.0.26100.6508
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* < 10.0.14393.8422
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* < 10.0.17763.7792
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* < 10.0.20348.4106
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* < 10.0.25398.1849
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* < 10.0.26100.6508

Produits affectés

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

Références

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54895

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD