# CVE-2026-91954

## Summary

- **CVE ID:** CVE-2026-91954
- **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-476
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 17, 2026

## Description

FreeRDP before 3.31.0 contains a null pointer dereference vulnerability in gdi_surface_bits when processing Surface Bits commands with NSCodec codec ID. A malicious RDP server can crash a FreeRDP client by sending a crafted Surface Bits command claiming to use NSCodec, even when the codec is disabled.

## Affected Products

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

## References

- [CNA](https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-ffjr-p229-hpch)
- [CNA](https://www.vulncheck.com/advisories/freerdp-before-3.31.0-null-pointer-dereference-via-nscodec)

## Exploitation Prediction (EPSS)

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

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