# CVE-2026-91951

## Summary

- **CVE ID:** CVE-2026-91951
- **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 versions before 3.31.0 contain an out-of-bounds write vulnerability in the urbdrc client channel's urb_send_current_frame_number_result() function. A malicious RDP server can send a crafted 28-byte USB redirection message to trigger a 4-byte write past the allocated 16-byte buffer, causing denial of service when verbose asserts are enabled.

## Affected Products

- FreeRDP — FreeRDP (3.14.0)
- FreeRDP — FreeRDP (3.31.0)

## References

- [CNA](https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-h5w2-q35j-443h)
- [CNA](https://www.vulncheck.com/advisories/freerdp-3.14.0-through-3.30.0-out-of-bounds-write-via-urbdrc)

## Exploitation Prediction (EPSS)

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

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