CVE-2026-21520
CVSS v3
7.5
HIGH
EPSS Score
1.5 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector
Technical details
- Published
- 2026-01-22
- Last Modified
- 2026-02-02
Frequently asked questions
What is CVE-2026-21520?
Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector
Is CVE-2026-21520 actively exploited?
Active exploitation of CVE-2026-21520 has not been confirmed. Its EPSS score was 1.5% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-21520?
CVE-2026-21520 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2026-21520 affecting your environment?
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