CVE-2026-20943

Microsoft Office Click-To-Run Remote Code Execution Vulnerability

En bref

Sévérité: HIGH 7.0
EPSS: EPSS 0.65 % · centile 51 (2026-10-27)
État: PUBLISHED
Publiée: 2026-01-13
Mise à jour: 2026-07-30
Attribuée par: microsoft
Statut NVD: Analyzed

Description

Untrusted search path in Microsoft Office allows an unauthorized attacker to execute code locally.

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	HIGH 7.0	CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft
CVSS 3.1	HIGH 7.0	CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H	NVD · secure@microsoft.com (Secondary)

Faiblesses (CWE)

CWE-426

Références européennes

ENISA EUVD · EUVD-2026-2140
GCVE · GCVE-0-2026-20943

Avis du CERT-FR

CERTFR-2026-AVI-0046 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr
CERTFR-2026-AVI-0043 — Multiples vulnérabilités dans Microsoft Office · cert.ssi.gouv.fr

Configurations affectées (CPE NVD)

cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office_deployment_tool:*:*:*:*:*:*:*:* < 16.0.19426.20170
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:* < 16.0.19127.20442
cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*

Produits affectés

Produit	Versions
Microsoft · Microsoft Office 2016	affected 16.0.0 < 16.0.5535.1000
Microsoft · Microsoft Office Deployment Tool	affected 1.0 < 16.0.19426.20170
Microsoft · Microsoft SharePoint Enterprise Server 2016	affected 16.0.0 < 16.0.5535.1001
Microsoft · Microsoft SharePoint Server 2019	affected 16.0.0 < 16.0.10417.20083
Microsoft · Microsoft SharePoint Server Subscription Edition	affected 16.0.0 < 16.0.19127.20442

Références

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20943

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