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High severity7.5NVD Advisory· Published Jan 22, 2026· Updated Jun 17, 2026

CVE-2026-21520

CVE-2026-21520

Description

Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector

Affected products

3
  • Microsoft/Copilot Studio3 versions
    cpe:2.3:a:microsoft:copilot_studio:-:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:microsoft:copilot_studio:-:*:*:*:*:*:*:*
    • (no CPE)
    • (no CPE)range: -

Patches

Vulnerability mechanics

References

1

News mentions

0

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