Improper Cryptographic Verification in Copilot Studio by Microsoft
CVE-2026-80098

9.3CRITICAL

Key Information:

Vendor

Microsoft
Status
Microsoft Copilot Studio
Vendor
CVE Published:
3 September 2026

What is CVE-2026-80098?

An improper verification of cryptographic signatures in Copilot Studio allows unauthorized attackers to elevate their privileges over a network, potentially compromising the integrity and security of connected systems. This vulnerability underscores the importance of robust cryptographic practices in software development.

Affected Version(s)

Microsoft Copilot Studio -

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
9.3
Severity:
CRITICAL
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.