CVE-2026-111377: FreeRDP from 2.0.0 before 3.32.0 contains an unbounded reassembly vulnerability in WTSProcessChannelData that

Routine

MEDIUM 6.5UPGRADE

CVE-2026-111377 is a medium-severity flaw (CVSS 6.5) affecting freerdp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FreeRDP from 2.0.0 before 3.32.0 contains an unbounded reassembly vulnerability in WTSProcessChannelData that fails to enforce cumulative fragment limits. Authenticated clients can start a static virtual channel message, withhold the LAST flag, and send endless fragments to exhaust server memory.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-400
Published	2026-10-16
Last modified	2026-10-20

Publisher (CNA): VulnCheck · Vendor: freerdp

Last updated 2026-10-20 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-16 03:18 UTCPublished CVE record published
2026-10-20 15:34 UTCUpdated Record last modified

freerdp freerdp UPGRADE

Affected: >= 2.0.0 and < 3.32.0

Fixed in: 3.32.0

Safe to downgrade to: a release before 2.0.0

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 2.0.0 (Debian / Ubuntu)

apt-cache madison freerdp sudo apt install freerdp=<VERSION_BEFORE_2.0.0> 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_2.0.0> 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.

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-2026-111377?

freerdp: upgrade to 3.32.0. Exact commands for each OS are on this page.

Is CVE-2026-111377 being exploited?

CVE-2026-111377 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-2026-111377 affect?

CVE-2026-111377 affects freerdp. Severity is medium (CVSS 6.5). FreeRDP from 2.0.0 before 3.32.0 contains an unbounded reassembly vulnerability in WTSProcessChannelData that fails to enforce cumulative fragment limits. Authenticated clients can start a static virtual channel message, withhold the LAST f

How urgent is CVE-2026-111377?

Priority 34/100. Public exploit reference

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-2026-55192 HIGH 8.2 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

References

← Back to latest CVEs