CVE-2026-80098 Copilot Studio Elevation of Privilege Vulnerability

CriticalCVSS 9.3

Published: 2026-09-04 01:59
Updated: 2026-11-10 23:38
Exploit status: No public exploit known

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Description

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

Affected products

Product	Affected versions	Fixed in
Microsoft copilot studio	All versions	No fix listed
Microsoft Copilot Studio	All versions	No fix listed

References

MSRC Security Update Guide patch vendor-advisory

CVSS v3.1

9.3 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N/E:U/RL:O/RC:C

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Changed
Confidentiality: Low
Integrity: High
Availability: None
Exploit Code Maturity: Unproven
Remediation Level: Official Fix
Report Confidence: Confirmed

Weakness & likelihood

EPSS (exploitation probability, 30 days): Not available
CWE: CWE-347 Improper Verification of Cryptographic Signature

Public exploit references

Metadata only. CVERadar never hosts or runs exploit code.

No public exploit references known.