# CVE-2026-91961

## Summary

- **CVE ID:** CVE-2026-91961
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-617
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

FreeRDP before 3.31.0 contains a denial-of-service vulnerability in the URBDRC control-transfer request path that fails to validate OutputBufferSize before forwarding to the libusb backend. A malicious RDP server can send a control-transfer request with OutputBufferSize set to 65536, triggering a reachable assertion that terminates the client process.

## Affected Products

- FreeRDP — FreeRDP (0)
- FreeRDP — FreeRDP (3.31.0)

## References

- [CNA](https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w9qg-g24r-77f6)
- [CNA](https://www.vulncheck.com/advisories/freerdp-before-3.31.0-denial-of-service-via-urbdrc)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 28.0

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._