CVE-2026-63652: FreeRDP is a free implementation of the Remote Desktop Protocol

Q: How do I fix CVE-2026-63652?

freerdp: upgrade to 3.28.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-63652 being exploited?

CVE-2026-63652 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-2026-63652 affect?

CVE-2026-63652 affects freerdp. Severity is medium (CVSS 6.5). FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, rdpsnd_server_recv_formats in channels/rdpsnd/server/rdpsnd_main.c frees context->client_formats on a malformed Client Audio Formats PDU without clearing the

This month

MEDIUM 6.5UPGRADE

CVE-2026-63652 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 is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, rdpsnd_server_recv_formats in channels/rdpsnd/server/rdpsnd_main.c frees context->client_formats on a malformed Client Audio Formats PDU without clearing the owning pointer or num_client_formats. An authenticated RDP client can trigger an error such as a cbSize larger than the remaining record, leave the dangling pointer in the server context, and cause rdpsnd_serve

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	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-415
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 18:17 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

freerdp freerdp UPGRADE

Affected: < 3.28.0

Fixed in: 3.28.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.28.0 (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.

Advisories and coverage

Official advisories

Amazon Linux 2 ALAS: ALAS2-2026-3906 (medium): freerdp 2026-09-14

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-2026-63652?

freerdp: upgrade to 3.28.0. Exact commands for each OS are on this page.

Is CVE-2026-63652 being exploited?

CVE-2026-63652 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-2026-63652 affect?

CVE-2026-63652 affects freerdp. Severity is medium (CVSS 6.5). FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, rdpsnd_server_recv_formats in channels/rdpsnd/server/rdpsnd_main.c frees context->client_formats on a malformed Client Audio Formats PDU without clearing the

How urgent is CVE-2026-63652?

Priority 40/100. Public exploit reference

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-2026-55192 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

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