Jan 2026: Copilot Studio Information Disclosure Vulnerability
CVE-2026-21520 Published on January 22, 2026
Copilot Studio Information Disclosure Vulnerability
Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector
Weakness Type
What is a Command Injection Vulnerability?
The software constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
CVE-2026-21520 has been classified to as a Command Injection vulnerability or weakness.
Products Associated with CVE-2026-21520
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Affected Versions
Microsoft Copilot Studio Version - is affected by CVE-2026-21520Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.