CVE-2026-110838: FreeRDP shadow server from 3.0.0 before 3.32.0 dispatches input PDUs during the Confirm Active state before au

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-110838 is a high-severity flaw (CVSS 7.5) affecting freerdp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FreeRDP shadow server from 3.0.0 before 3.32.0 dispatches input PDUs during the Confirm Active state before authentication, allowing unauthenticated attackers to inject keyboard input. Attackers can negotiate TLS-only RDP and send an input PDU without Confirm Active to inject synthetic keystrokes into the host user's X11 session via XTEST.

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	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-10-14
Last modified	2026-10-23

Publisher (CNA): VulnCheck · Vendor: freerdp

Am I affected?

Timeline

2026-10-14 23:17 UTCPublished CVE record published
2026-10-23 20:29 UTCUpdated Record last modified

freerdp freerdp UPGRADE

Affected: >= 3.0.0 and < 3.32.0

Fixed in: 3.32.0

Safe to downgrade to: a release before 3.0.0

1. Check installed version

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

2. UPGRADE to 3.32.0 (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.

3. If no update is available yet, DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison freerdp sudo apt install freerdp=<VERSION_BEFORE_3.0.0> sudo apt-mark hold freerdp

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list freerdp sudo dnf downgrade freerdp-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add freerdp

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · clementine · FIXED · 1.4.2-1.fc46 · FEDORA-2026-3e748ef4d3 · source

sudo dnf upgrade --advisory=FEDORA-2026-3e748ef4d3

Ubuntu 24.04 · freerdp3 · FIXED · 3.32.0+dfsg-0ubuntu0.24.04.1

sudo apt update && sudo apt install --only-upgrade freerdp3 dpkg --compare-versions "$(dpkg-query -W -f='${Version}' freerdp3)" ge "3.32.0+dfsg-0ubuntu0.24.04.1" && echo PATCHED || echo STILL-VULNERABLE

Debian 12 · freerdp2 · NO FIX YET

Debian 13 · freerdp3 · NO FIX YET

RHEL 10 · freerdp · NO FIX YET

RHEL 6 · freerdp · NOT AFFECTED

RHEL 7 · freerdp · NOT AFFECTED

RHEL 8 · freerdp · NOT AFFECTED

RHEL 9 · freerdp · NOT AFFECTED

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.

Related CVEs

CVE-2026-110839 HIGH 7.1 UPGRADE FreeRDP 3.3.0 before 3.32.0, when built with WINPR_UTILS_IMAGE_JPEG=ON, has a heap-based out-of-bounds write i
CVE-2026-110834 MEDIUM 6.5 UPGRADE FreeRDP from 2.0.0 before 3.32.0 contains a null pointer dereference vulnerability that allows malicious RDP s
CVE-2026-110835 MEDIUM 4.0 UPGRADE FreeRDP 3.0.0 before 3.32.0 allows HTTP header injection in its proxy because a lone LF in the target portion
CVE-2026-110836 MEDIUM 6.5 UPGRADE FreeRDP from 3.0.0 before 3.32.0 contains an infinite loop vulnerability in http_response_recv() that allows m
CVE-2026-110837 HIGH 7.1 UPGRADE FreeRDP 2.0.0 before 3.32.0, when built with WITH_LAME=ON and WITH_DSP_FFMPEG=OFF, has a heap-based buffer ove

References

← Back to latest CVEs