CVE-2026-33826

Windows Active Directory Remote Code Execution Vulnerability

En bref

Sévérité: HIGH 8.0
EPSS: EPSS 0.53 % · centile 45 (2026-10-27)
État: PUBLISHED
Publiée: 2026-04-14
Mise à jour: 2026-10-15
Attribuée par: microsoft
Statut NVD: Analyzed

Description

Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	HIGH 8.0	CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft
CVSS 3.1	HIGH 8.0	CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · secure@microsoft.com (Secondary)

Faiblesses (CWE)

CWE-20

Références européennes

ENISA EUVD · EUVD-2026-22645
GCVE · GCVE-0-2026-33826

Avis du CERT-FR

CERTFR-2026-AVI-0442 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr

Configurations affectées (CPE NVD)

cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* < 10.0.14393.9060
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* < 10.0.17763.8644
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* < 10.0.20348.5020
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* < 10.0.25398.2274
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* < 10.0.26100.32690

Produits affectés

Produit	Versions
Microsoft · Windows Server 2012 R2	affected 6.3.9600.0 < 6.3.9600.23132
Microsoft · Windows Server 2012 R2 (Server Core installation)	affected 6.3.9600.0 < 6.3.9600.23132
Microsoft · Windows Server 2016	affected 10.0.14393.0 < 10.0.14393.9060
Microsoft · Windows Server 2016 (Server Core installation)	affected 10.0.14393.0 < 10.0.14393.9060
Microsoft · Windows Server 2019	affected 10.0.17763.0 < 10.0.17763.8644
Microsoft · Windows Server 2019 (Server Core installation)	affected 10.0.17763.0 < 10.0.17763.8644
Microsoft · Windows Server 2022	affected 10.0.20348.0 < 10.0.20348.5020
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)	affected 10.0.25398.0 < 10.0.25398.2274
Microsoft · Windows Server 2025	affected 10.0.26100.0 < 10.0.26100.32690
Microsoft · Windows Server 2025 (Server Core installation)	affected 10.0.26100.0 < 10.0.26100.32690

Références

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33826

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