CVE-2026-57156: FreeRDP is a free implementation of the Remote Desktop Protocol

Q: How do I fix CVE-2026-57156?

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

Q: Is CVE-2026-57156 being exploited?

CVE-2026-57156 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-2026-57156 affect?

CVE-2026-57156 affects freerdp. Severity is critical (CVSS 9.8). FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0 on 32-bit builds, FreeRDP clients contain an integer overflow in update_read_delta_points in libfreerdp/core/orders.c when multiplying an attacker-controlled p

Q: How urgent is CVE-2026-57156?

Priority 58/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-57156 is a critical-severity flaw (CVSS 9.8) 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 on 32-bit builds, FreeRDP clients contain an integer overflow in update_read_delta_points in libfreerdp/core/orders.c when multiplying an attacker-controlled point count by sizeof(DELTA_POINT), allowing a malicious RDP peer to allocate an undersized heap buffer and then write beyond it during initialization. This issue is fixed in version 3.28.0.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-122, CWE-190
Published	2026-07-10
Last modified	2026-07-15

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

Last updated 2026-07-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-10 20:16 UTCPublished CVE record published
2026-07-15 05:17 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.

Exact fixes by distribution

Fedora 46 · gcl · FIXED · 2.7.1-12.fc46 · FEDORA-2026-ff383a759b · source

sudo dnf upgrade --advisory=FEDORA-2026-ff383a759b

Fedora ELN · mozjs140 · FIXED · 140.13.0-5.eln159 · FEDORA-2026-f7ed0026e0 · source

sudo dnf upgrade --advisory=FEDORA-2026-f7ed0026e0

Debian 12 · freerdp2 · NO FIX YET

Debian 13 · freerdp3 · NO FIX YET

RHEL 10 · freerdp · NOT AFFECTED

RHEL 6 · freerdp · DEFERRED

RHEL 7 · freerdp · DEFERRED

RHEL 8 · freerdp · NOT AFFECTED

RHEL 9 · freerdp · NOT AFFECTED

Alpine 3.24 · freerdp · FIXED · freerdp-3.29.0-r0

apk add --upgrade freerdp apk info -v freerdp

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v5wf-j8j4-77h7

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-2026-57156?

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

Is CVE-2026-57156 being exploited?

CVE-2026-57156 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-2026-57156 affect?

CVE-2026-57156 affects freerdp. Severity is critical (CVSS 9.8). FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0 on 32-bit builds, FreeRDP clients contain an integer overflow in update_read_delta_points in libfreerdp/core/orders.c when multiplying an attacker-controlled p

How urgent is CVE-2026-57156?

Priority 58/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

WinRM and RDP vulnerabilities

Related CVEs

CVE-2026-109940 MEDIUM 4.3 UPGRADE FreeRDP 3.0.0-beta1 before 3.32.0 on Unix builds with PKCS#11 support has a stack-based buffer overflow in wpr
CVE-2026-109939 MEDIUM 6.5 UPGRADE FreeRDP 3.27.1 before 3.32.0 contains a NULL pointer dereference in update_read_cache_bitmap_v3_order() in lib
CVE-2026-109938 MEDIUM 6.5 UPGRADE Positive mapped-video coordinates overflow and abort FreeRDP clients A malicious or compromised RDP server can
CVE-2026-109941 MEDIUM 6.5 UPGRADE FreeRDP from 2.3.0 before 3.32.0 contains an infinite loop vulnerability in http_chuncked_read that allows mal
CVE-2026-109942 MEDIUM 6.5 UPGRADE FreeRDP 2.3.0 before 3.32.0 dereferences a NULL stream in rdg_process_close_packet in libfreerdp/core/gateway/

References

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