CVE-2026-20949

CWE-284 — Improper Access Control5 documents5 sources
Severity
7.8HIGH
EPSS
0.0%
top 94.83%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
Microsoft Microsoft 365 Apps FOR EnterpriseMicrosoft Microsoft Office Ltsc 2021Microsoft Microsoft Office Ltsc 2024+3 more
Timeline
PublishedJan 13

Description

Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages6 packages

▶CVEListV5microsoft/microsoft_office_ltsc_202116.0.1 — https://aka.ms/OfficeSecurityReleases
▶CVEListV5microsoft/microsoft_office_ltsc_202416.0.0 — https://aka.ms/OfficeSecurityReleases
▶CVEListV5microsoft/microsoft_office_ltsc_for_mac_202116.0.1 — 16.105.26011018
▶CVEListV5microsoft/microsoft_office_ltsc_for_mac_202416.0.0 — 16.105.26011018

🔴Vulnerability Details

2
GHSA
GHSA-2vvv-3xfp-234v: Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally↗2026-01-13
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CVEList
Microsoft Excel Security Feature Bypass Vulnerability↗2026-01-13
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📋Vendor Advisories

1
Microsoft
Microsoft Excel Security Feature Bypass Vulnerability↗2026-01-13
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🕵️Threat Intelligence

1
Wiz
CVE-2026-20949 Impact, Exploitability, and Mitigation Steps | Wiz↗
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