CVE-2026-111881

7.6

FreeRDP Integer Underflow Vulnerability

CVSS: 7.6, high high CVSS v3.1
EPSS, next 30 days: n/a
Exploitation: No public evidence
Published: 17 Oct 2026yesterday

Description

FreeRDP from 3.14.1 before 3.32.0 contains an integer underflow in the WinPR BMP writer, where a mismatched stride calculation passes SIZE_MAX - 3 to Stream_Zero for sub-byte images. A malicious RDP clipboard peer can return a crafted 1-bpp BMP processed by clipboard_synthesize_image_format_to_bmp for CF_DIB/CF_DIBV5, crashing the client or causing an out-of-bounds write.

Details

Vendor: FreeRDP
Product: FreeRDP
Weakness: CWE-191 (opens in a new tab)
Status: Received
Updated: 17 Oct 2026
Assigner: disclosure@vulncheck.com

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

References 2

Advisories 1

github.com /FreeRDP/FreeRDP/security/advisories/GHSA-27m7-gwhh-6hhf (opens in a new tab)

Other references 1

vulncheck.com /advisories/freerdp-3.14.1-before-3.32.0-integer-underflow-in-bmp-writer-via-clipboard (opens in a new tab)

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-2026-111880 FreeRDP Out-of-Bounds Write Vulnerability 7.4, high
CVE-2026-111378 FreeRDP Uncontrolled Resource Consumption Vulnerability EPSS 0.3% 7.5, high
CVE-2026-111379 FreeRDP Heap-based Buffer Overflow Vulnerability EPSS 0.1% 7.3, high
CVE-2026-111380 FreeRDP Integer Overflow Vulnerability EPSS 0.3% 8.8, high
CVE-2026-111381 FreeRDP Heap-based Buffer Overflow Vulnerability EPSS 0.1% 7.3, high
CVE-2026-111382 FreeRDP Out-of-Bounds Write Vulnerability EPSS 0.3% 8.8, high
CVE-2026-110837 FreeRDP Heap-based Buffer Overflow Vulnerability EPSS 0.3% 7.1, high
CVE-2026-110838 FreeRDP Missing Authentication for Critical Function Vulnerability EPSS 0.3% 7.5, high

Beyond this page

Is CVE-2026-111881 in your network?

This page tells you how dangerous CVE-2026-111881 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.

EXYS7600 OCELOT

Find it before attackers do

Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-111881 comes with the devices to patch.
Learn more about EXYS7600 OCELOT
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.
Learn more about EXYS7950 KONDRA

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 18 Oct 2026, not the live upstream state.