What’s Vulnerable › Vulnerabilities

CVE-2026-41614: M365 Copilot for Desktop Spoofing Vulnerability

• Severity: medium (CVSS 6.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-12 · updated 2026-10-26
• Weakness: CWE-284

Description

Improper access control in M365 Copilot for Desktop allows an unauthorized attacker to perform spoofing locally.

Affected products

• Microsoft 365 Copilot: before 19.2604.43111.0 — fixed in 19.2604.43111.0
• Microsoft 365 Copilot: from 1.0.0 before 19.2604.43111.0 — fixed in 19.2604.43111.0

How to fix

Upgrade to a fixed version: Microsoft 365 Copilot 19.2604.43111.0; Microsoft 365 Copilot 19.2604.43111.0. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41614

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