CVE Catalog

CVE-2026-41100

MediumCVSS 4.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.25%

16th percentile - higher than 16% of all known CVEs

Summary

M365 Copilot contains an improper access control vulnerability that allows an authorized attacker to perform spoofing locally. The vulnerability enables impersonation of other resources or users in a local environment.

Risk Assessment

An attacker with valid privileges can impersonate other resources or users, potentially leading to unauthorized actions. This may undermine trust in organizational data and processes.

Recommendation

Apply Microsoft security updates for M365 Copilot. Monitor for unusual spoofing-related activity and restrict privileges to the minimum necessary.

Other vulnerabilities in M365 Copilot

See all
Original NVD description (English source)

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

Vulnerability data from NVD (NIST) · CISA KEV · EPSS