CVE-2026-32191
Published: 19 March 2026
Summary
CVE-2026-32191 is a critical-severity OS Command Injection (CWE-78) vulnerability in Microsoft Bing Images. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 42.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2026-32191 is an OS command injection vulnerability (CWE-78) in Microsoft Bing Images, caused by improper neutralization of special elements used in an OS command. Published on 2026-03-19, it carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), marking it as critical due to its potential for severe impact.
An unauthorized attacker can exploit this vulnerability remotely over the network with low attack complexity, requiring no privileges, user interaction, or special scoping changes. Exploitation enables arbitrary code execution on the affected component, compromising confidentiality, integrity, and availability to a high degree.
The Microsoft Security Response Center advisory provides details on mitigation and patches at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32191.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-13206
Vulnerability details
Improper neutralization of special elements used in an os command ('os command injection') in Microsoft Bing Images allows an unauthorized attacker to execute code over a network.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE-2026-32191 is a critical remote OS command injection vulnerability in the public-facing Microsoft Bing Images service, enabling arbitrary code execution without authentication or user interaction, directly mapping to exploitation of public-facing applications.
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Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
SI-10 directly requires information input validation and error handling to neutralize special elements, preventing the OS command injection vulnerability in Microsoft Bing Images.
SI-2 mandates identification, reporting, and remediation of flaws like CVE-2026-32191, enabling application of patches from the MSRC advisory.
SI-4 provides system monitoring to detect indicators of successful OS command injection exploitation, such as unauthorized code execution or anomalous behavior.