CVE-2026-21520: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in Microsoft Microsoft Copilot Studio
Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector
AI Analysis
Technical Summary
This vulnerability (CWE-77) in Microsoft Copilot Studio allows an unauthenticated attacker to perform command injection due to improper neutralization of special elements used in commands. This flaw enables exposure of sensitive information through network attack vectors. The CVSS 3.1 base score is 7.5, reflecting network attack vector, no privileges required, no user interaction, and high confidentiality impact. The vulnerability is published and a patch is available, though specific patch links were not provided.
Potential Impact
Successful exploitation results in unauthorized disclosure of sensitive information. There is no impact on integrity or availability. The attacker does not require authentication and can exploit the vulnerability remotely over the network.
Mitigation Recommendations
A patch is available for this vulnerability and should be applied promptly to remediate the issue. Since this is not a cloud service, remediation depends on deploying the vendor's fix. Check official Microsoft advisories for the exact patch details and installation instructions.
CVE-2026-21520: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in Microsoft Microsoft Copilot Studio
Description
Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-77) in Microsoft Copilot Studio allows an unauthenticated attacker to perform command injection due to improper neutralization of special elements used in commands. This flaw enables exposure of sensitive information through network attack vectors. The CVSS 3.1 base score is 7.5, reflecting network attack vector, no privileges required, no user interaction, and high confidentiality impact. The vulnerability is published and a patch is available, though specific patch links were not provided.
Potential Impact
Successful exploitation results in unauthorized disclosure of sensitive information. There is no impact on integrity or availability. The attacker does not require authentication and can exploit the vulnerability remotely over the network.
Mitigation Recommendations
A patch is available for this vulnerability and should be applied promptly to remediate the issue. Since this is not a cloud service, remediation depends on deploying the vendor's fix. Check official Microsoft advisories for the exact patch details and installation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-30T18:10:54.846Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6972ad5b4623b1157c962ba0
Added to database: 1/22/2026, 11:06:03 PM
Last enriched: 4/3/2026, 12:54:33 PM
Last updated: 5/10/2026, 7:58:24 AM
Views: 121
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