CVE-2025-21355

Microsoft Bing Remote Code Execution Vulnerability

Description

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

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
EPSS 1.27% Top 25%
Vendor Advisory microsoft.com
Affected: Microsoft Microsoft Bing
Published at:
Updated at:

References

Link Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21355 patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-21355?
CVE-2025-21355 has been scored as a high severity vulnerability.
How to fix CVE-2025-21355?
To fix CVE-2025-21355, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-21355 being actively exploited in the wild?
It is possible that CVE-2025-21355 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-21355?
CVE-2025-21355 affects Microsoft Microsoft Bing.
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