CVE-2026-41100

Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.

Score

CVSS 3.1 4.4 Medium

Status

Analyzed - secure@microsoft.com

Published

2026-05-12

Last modified

2026-10-26

Weaknesses

CWE-284

Affected products

• 365 Copilot (Microsoft)
• 365 Copilot Android (Microsoft)
• Excel (Microsoft)
• Loop (Microsoft)
• Onenote For Android (Microsoft)
• Powerpoint (Microsoft)
• Word (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41100