CVE-2026-20949

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

Score

CVSS 3.1 7.8 High

Status

Analyzed - secure@microsoft.com

Published

2026-01-13

Last modified

2026-07-30

Weaknesses

CWE-284

Affected products

• 365 Apps (Microsoft)
• Office 2021 (Microsoft)
• Office 2024 (Microsoft)
• Office Long Term Servicing Channel (Microsoft)
• Office Macos 2021 (Microsoft)
• Office Macos 2024 (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20949