CVE-2026-80098
Critical
Description
Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.
SeverityCritical
CVSS9.3
Exploit probability42. percentile0.5%
Product
Microsoft Copilot Studio
PublishedSep 3, 2026
First seenSep 3, 2026
Weakness typeCWE-347CWE-347
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft copilot_studio | No range specified | — |
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