CVE-2026-121964: FreeRDP before 3.32.2 contains a heap-based buffer overflow in the RD Gateway RPC client, where rpc_client_rec

Q: How do I fix CVE-2026-121964?

freerdp: upgrade to 3.32.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-121964 being exploited?

CVE-2026-121964 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-2026-121964 affect?

CVE-2026-121964 affects freerdp. Severity is high (CVSS 7.5). FreeRDP before 3.32.2 contains a heap-based buffer overflow in the RD Gateway RPC client, where rpc_client_recv_fragment writes BIND_ACK and ALTER_CONTEXT_RESP fragments into a persistent PDU stream after checking only total capacity rather

Q: How urgent is CVE-2026-121964?

Priority 36/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-121964 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 before 3.32.2 contains a heap-based buffer overflow in the RD Gateway RPC client, where rpc_client_recv_fragment writes BIND_ACK and ALTER_CONTEXT_RESP fragments into a persistent PDU stream after checking only total capacity rather than remaining capacity from the current stream position. A malicious or compromised RD Gateway can send crafted RPC fragments with manipulated alloc_hint and frag_length values to overwrite client heap memory

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	n/a
CISA exploited list	No
Weakness	CWE-122
Published	2026-11-04
Last modified	2026-11-04

Publisher (CNA): VulnCheck · Vendor: freerdp

Last updated 2026-11-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-11-04 16:17 UTCPublished CVE record published
2026-11-04 19:17 UTCUpdated Record last modified

freerdp freerdp UPGRADE

Affected: < 3.32.2

Fixed in: 3.32.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.32.2 (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

Research and news

VulDB Recent Entries: CVE-2026-121964 | FreeRDP up to 3.32.1 RD Gateway RPC Client rpc_client_recv_fragment alloc_hint/frag_length buffer overflow 2026-11-04
Vulners Bulletins: CVE-2026-121964 2026-11-04

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-2026-121964?

freerdp: upgrade to 3.32.2. Exact commands for each OS are on this page.

Is CVE-2026-121964 being exploited?

CVE-2026-121964 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-2026-121964 affect?

CVE-2026-121964 affects freerdp. Severity is high (CVSS 7.5). FreeRDP before 3.32.2 contains a heap-based buffer overflow in the RD Gateway RPC client, where rpc_client_recv_fragment writes BIND_ACK and ALTER_CONTEXT_RESP fragments into a persistent PDU stream after checking only total capacity rather

How urgent is CVE-2026-121964?

Priority 36/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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