CVE-2026-20925

NTLM Hash Disclosure Spoofing Vulnerability

En bref

Sévérité: MEDIUM 6.5
EPSS: EPSS 17.93 % · centile 97 (2026-10-27)
État: PUBLISHED
Publiée: 2026-01-13
Mise à jour: 2026-07-30
Attribuée par: microsoft
Statut NVD: Analyzed

Description

External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C	microsoft
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N	NVD · secure@microsoft.com (Secondary)

Faiblesses (CWE)

CWE-73

Références européennes

ENISA EUVD · EUVD-2026-2142
GCVE · GCVE-0-2026-20925

Avis du CERT-FR

CERTFR-2026-AVI-0044 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr

Configurations affectées (CPE NVD)

cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* < 10.0.14393.8783
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* < 10.0.14393.8783
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* < 10.0.17763.8276
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* < 10.0.17763.8276
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:* < 10.0.19044.6809
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:* < 10.0.19045.6809
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:* < 10.0.22631.6491
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:* < 10.0.26100.7623
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:* < 10.0.26200.7623
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:*
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:*:*:*:*:*:*:*:* < 10.0.14393.8783
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* < 10.0.17763.8276
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* < 10.0.20348.4648
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* < 10.0.25398.2092
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* < 10.0.26100.32230

Produits affectés

Produit	Versions
Microsoft · Windows 10 Version 1607	affected 10.0.14393.0 < 10.0.14393.8783
Microsoft · Windows 10 Version 1809	affected 10.0.17763.0 < 10.0.17763.8276
Microsoft · Windows 10 Version 21H2	affected 10.0.19044.0 < 10.0.19044.6809
Microsoft · Windows 10 Version 22H2	affected 10.0.19045.0 < 10.0.19045.6809
Microsoft · Windows 11 version 23H2	affected 10.0.22631.0 < 10.0.22631.6491
Microsoft · Windows 11 Version 23H2	affected 10.0.22631.0 < 10.0.22631.6491
Microsoft · Windows 11 Version 24H2	affected 10.0.26100.0 < 10.0.26100.7623
Microsoft · Windows 11 Version 25H2	affected 10.0.26200.0 < 10.0.26200.7623
Microsoft · Windows Server 2008 R2 Service Pack 1	affected 6.1.7601.0 < 6.1.7601.28117
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)	affected 6.1.7601.0 < 6.1.7601.28117
Microsoft · Windows Server 2008 Service Pack 2	affected 6.0.6003.0 < 6.0.6003.23717
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)	affected 6.0.6003.0 < 6.0.6003.23717
Microsoft · Windows Server 2012	affected 6.2.9200.0 < 6.2.9200.25868
Microsoft · Windows Server 2012 (Server Core installation)	affected 6.2.9200.0 < 6.2.9200.25868
Microsoft · Windows Server 2012 R2	affected 6.3.9600.0 < 6.3.9600.22968
Microsoft · Windows Server 2012 R2 (Server Core installation)	affected 6.3.9600.0 < 6.3.9600.22968
Microsoft · Windows Server 2016	affected 10.0.14393.0 < 10.0.14393.8783
Microsoft · Windows Server 2016 (Server Core installation)	affected 10.0.14393.0 < 10.0.14393.8783
Microsoft · Windows Server 2019	affected 10.0.17763.0 < 10.0.17763.8276
Microsoft · Windows Server 2019 (Server Core installation)	affected 10.0.17763.0 < 10.0.17763.8276

Références

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20925

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