CVE-2026-80098

Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.

Score

CVSS 3.1 10.0 Critical

Status

Analyzed - secure@microsoft.com

Published

2026-09-03

Last modified

2026-10-14

Weaknesses

CWE-347

Affected products

• Copilot Studio (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80098