# CVE-2026-91963

## Summary

- **CVE ID:** CVE-2026-91963
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-457
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

FreeRDP versions before 3.31.0 contain an uninitialized heap memory disclosure vulnerability in the urbdrc USB redirection channel. A malicious RDP server can induce failing USB transfers to read uninitialized heap memory from the client, defeating ASLR and enabling remote code execution when chained with memory corruption vulnerabilities.

## Affected Products

- FreeRDP — FreeRDP (2.0.0)
- FreeRDP — FreeRDP (3.0.0)
- FreeRDP — FreeRDP (3.31.0)
- FreeRDP — FreeRDP (0)

## References

- [CNA](https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hw7p-5h2r-83gq)
- [CNA](https://www.vulncheck.com/advisories/freerdp-2.0.0-through-3.30.0-uninitialized-heap-memory-disclosure-via-urbdrc)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.64%
- **EPSS Percentile:** 49.0

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