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CVE-2026-121957

7, high

FreeRDP Race Condition Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7, high high CVSS v3.1
EPSS, next 30 days
0.3% higher than 24.8% of scored CVEs
Exploitation
Exploit code published
Published
4 Nov 20262 days ago

Description

FreeRDP before 3.32.2 contains a use-after-free vulnerability that allows malicious RDP servers to corrupt client memory by racing the RDPGFX ResetGraphics handler against the planar bitmap decoder. Attackers can send ResetGraphics while concurrently sending compressed bitmaps of 32 bpp or more to trigger heap use-after-free or out-of-bounds read/write on shared planar buffers.

Details

Vendor
FreeRDP
Product
FreeRDP
Weakness
CWE-362 (opens in a new tab)
Status
Analyzed
Updated
5 Nov 2026
Assigner
disclosure@vulncheck.com

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

References 2

Exploit code 1

Advisories 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other FreeRDP CVEs

Every FreeRDP CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-121958 FreeRDP Heap-based Buffer Overflow Vulnerability EPSS 0.3% 7.5, high
  • CVE-2026-121386 FreeRDP before 3.32.2 contains a denial of service vulnerability in WinPR's winpr_read_png_from_buffer() and winpr_convert_from_jpeg(),… EPSS 0.3% 7.5, high
  • CVE-2026-114045 FreeRDP Heap-based Buffer Overflow Vulnerability EPSS 0.6% 8.8, high
  • CVE-2026-111880 FreeRDP Out-of-Bounds Write Vulnerability EPSS 0.3% 7.4, high
  • CVE-2026-111881 FreeRDP Integer Underflow Vulnerability EPSS 0.2% 7.6, high
  • CVE-2026-111378 FreeRDP Uncontrolled Resource Consumption Vulnerability EPSS 0.5% 7.5, high
  • CVE-2026-111379 FreeRDP Heap-based Buffer Overflow Vulnerability EPSS 0.2% 7.3, high
  • CVE-2026-111380 FreeRDP Integer Overflow Vulnerability EPSS 0.3% 8.8, high

Beyond this page

Is CVE-2026-121957 in your network?

This page tells you how dangerous CVE-2026-121957 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 6 Nov 2026, not the live upstream state.