MSRC-CVE-2025-21355 — Microsoft Bing Remote Code Execution Vulnerability

Summary

Impact: Remote Code Execution. Microsoft rating: Critical. Not known to be exploited. 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

High 8.6

CVE-2025-21355

Microsoft Bing Remote Code Execution Vulnerability

Missing Authentication for Critical Function in Microsoft Bing allows an unauthorized attacker to execute code over a network

Microsoft Microsoft Bing

Feb 19, 2025

Revision history

2025-02-19 #1
Information published.

References

CVE-2025-21355 Microsoft Bing Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21355
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