CVE-2025-21355
published 2025-02-19CVE-2025-21355: Missing Authentication for Critical Function in Microsoft Bing allows an unauthorized attacker to execute code over a network
PriorityP268critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
1.50%
71.1th percentile
Missing Authentication for Critical Function in Microsoft Bing allows an unauthorized attacker to execute code over a network
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_bing | — | — |
| msrc | microsoft_bing | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- ·This vulnerability was fully mitigated server-side by Microsoft with no customer action required. No patch, update, or configuration change is needed. The CVE was published purely for transparency purposes regarding a cloud service fix. ↗
- ·No public exploit exists and no in-the-wild exploitation has been observed, limiting the urgency for detection engineering efforts. ↗
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_msrc8.6HIGH
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Microsoft
Microsoft Bing Remote Code Execution Vulnerability
vendor_msrc·2025-02-11·CVSS 8.6
CVE-2025-21355 [HIGH] CWE-306 Microsoft Bing Remote Code Execution Vulnerability
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
FAQ: 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.
Microsoft Bing: Microsoft Bing
Microsoft: Microsoft
Customer Action Required: No
Impact: Remote Code Execution
Exploit Status: Publicly Disclosed:No;Exploited:No;Latest Software Release:N/A
GHSA
GHSA-fx4j-9fqf-p9p2: Missing Authentication for Critical Function in Microsoft Bing allows an unauthorized attacker to execute code over a network
ghsa_unreviewed·2025-02-20
CVE-2025-21355 [HIGH] CWE-306 GHSA-fx4j-9fqf-p9p2: Missing Authentication for Critical Function in Microsoft Bing allows an unauthorized attacker to execute code over a network
Missing Authentication for Critical Function in Microsoft Bing allows an unauthorized attacker to execute code over a network
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-02-19
Published