What is CVE-2025-21355?

CVE-2025-21355 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. Microsoft Bing Remote Code Execution Vulnerability

Which CVE IDs does CVE-2025-21355 cover?

CVE-2025-21355 covers the following CVE IDs: CVE-2025-21355. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-21355?

CVE-2025-21355 has a CVSS v3 base score of 8.6, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-21355?

CVE-2025-21355 affects 1 product, including: Microsoft Bing.

CVE-2025-21355CriticalCVSS 8.6

Microsoft Bing Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

June 3, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-21355 →

📋 Description

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

🎯 Affected products1

Microsoft Bing

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21355