MSRC-CVE-2025-59286 — Microsoft Copilot Information Disclosure Vulnerability

Summary

Impact: Spoofing. Microsoft rating: Critical. Not known to be exploited — Exploitation Less Likely. Customer action: Not required.

Details

Why are there no links to an update or instructions with steps that must be taken to protect from this vulnerability?
This vulnerability has already been fully mitigated by Microsoft. There is no action for users of this service to take. The purpose of this CVE is to provide further transparency.
Please see Toward greater transparency: Unveiling Cloud Service CVEs for more information.

Vulnerabilities 1

Critical 9.3

CVE-2025-59286

Copilot Information Disclosure Vulnerability

Improper neutralization of special elements used in a command ('command injection') in Copilot allows an unauthorized attacker to disclose information over a network.

Microsoft Microsoft 365 Copilot's Business Chat

Oct 9, 2025

Revision history

2025-11-21 #2
Updated information to include CVSS scores. This is an informational change only.
2025-10-09 #1
Information published.

References

CVE-2025-59286 Microsoft Copilot Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59286
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss