CVE-2026-80098
CVSS v3
9.3
CRITICAL
EPSS Score
0.5 %
exploit probability, as of 2026-09-28
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.
Technical details
- Published
- 2026-09-03
- Last Modified
- 2026-09-05
Frequently asked questions
What is CVE-2026-80098?
Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.
Is CVE-2026-80098 actively exploited?
Active exploitation of CVE-2026-80098 has not been confirmed. Its EPSS score was 0.5% on 2026-09-28, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-80098?
CVE-2026-80098 has a CVSS v3 base score of 9.3 (CRITICAL severity).
Is CVE-2026-80098 affecting your environment?
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