# CVE-2026-91947

## Summary

- **CVE ID:** CVE-2026-91947
- **Severity:** HIGH
- **CVSS Score:** 7.7 (CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-362
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 16, 2026

## Description

FreeRDP server versions before 3.31.0 contain a use-after-free vulnerability in the DRDYNVC parser that dereferences a channel pointer after releasing the synchronization lock. Authenticated clients can race AUDIN channel closure messages against DRDYNVC data parsing to trigger heap-use-after-free when accessing freed channel objects.

## Affected Products

- FreeRDP — FreeRDP (2.0.0)
- FreeRDP — FreeRDP (3.31.0)

## References

- [CNA](https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6mpx-c8rj-whj5)
- [CNA](https://www.vulncheck.com/advisories/freerdp-server-before-3.31.0-use-after-free-via-drdynvc)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.30%
- **EPSS Percentile:** 22.7

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