CVE-2026-55192: FreeRDP is a free implementation of the Remote Desktop Protocol

Q: How do I fix CVE-2026-55192?

freerdp: upgrade to 3.27.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-55192 being exploited?

CVE-2026-55192 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-55192 affect?

CVE-2026-55192 affects freerdp. Severity is high (CVSS 8.2). FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP H.264 decoder backends can return YUV planes sized from the bitstream without comparing the decoded width and height to the RDPGFX surface dimensions

Q: How urgent is CVE-2026-55192?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.2REMOTEUPGRADE

CVE-2026-55192 is a high-severity flaw (CVSS 8.2) affecting freerdp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP H.264 decoder backends can return YUV planes sized from the bitstream without comparing the decoded width and height to the RDPGFX surface dimensions used to validate region rectangles. A malicious RDP server can provide an AVC420 or AVC444 bitstream whose decoded frame is smaller than the negotiated surface, causing yuv420_context_decode and the YUV-to-RGB

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-08-19
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: freerdp

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-19 18:16 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

freerdp freerdp UPGRADE

Affected: < 3.27.0

Fixed in: 3.27.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy freerdp || rpm -q freerdp || freerdp --version

2. UPGRADE to 3.27.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade freerdp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade freerdp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-55192?

freerdp: upgrade to 3.27.0. Exact commands for each OS are on this page.

Is CVE-2026-55192 being exploited?

CVE-2026-55192 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-55192 affect?

CVE-2026-55192 affects freerdp. Severity is high (CVSS 8.2). FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP H.264 decoder backends can return YUV planes sized from the bitstream without comparing the decoded width and height to the RDPGFX surface dimensions

How urgent is CVE-2026-55192?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

WinRM and RDP vulnerabilities

Related CVEs

CVE-2026-55191 CRITICAL 9.8 UPGRADE FreeRDP is a free implementation of the Remote Desktop Protocol
CVE-2026-55194 CRITICAL 9.8 UPGRADE FreeRDP is a free implementation of the Remote Desktop Protocol
CVE-2026-63633 CRITICAL 9.8 UPGRADE FreeRDP is a free implementation of the Remote Desktop Protocol
CVE-2026-55193 HIGH 8.8 UPGRADE FreeRDP is a free implementation of the Remote Desktop Protocol
CVE-2026-55648 HIGH 7.5 UPGRADE FreeRDP is a free implementation of the Remote Desktop Protocol

References

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