# CVE-2026-80098

## Summary

- **CVE ID:** CVE-2026-80098
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (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)
- **CWE:** CWE-347
- **Published:** Sep 3, 2026
- **Last Modified:** Sep 10, 2026

## Description

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

## Affected Products

- Microsoft — Microsoft Copilot Studio (-)

## References

- [CNA](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80098)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.33%
- **EPSS Percentile:** 26.4

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._