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Vulnerabilities

Vulnerability · CVE-2026-26955

FreeRDP is a free implementation of the Remote Desktop Protocol.

Published Feb 25, 2026 · catalog updated Jul 15, 2026 · FreeRDP is a free

Check if you run it

No confirmed exploitation is on record for CVE-2026-26955. EPSS is 0.57%. Act only if a listed version of FreeRDP is a free is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (FreeRDP is a free).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.57%
Remediation
Advisory link
Affected products
cpe freerdp/freerdp

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a malicious RDP server can trigger a heap buffer overflow in FreeRDP clients using the GDI surface pipeline (e.g., ) by sending an RDPGFX ClearCodec surface command with an out-of-bounds destination rectangle. The handler does not call to validate the command rectangle against the destination surface dimensions, allowing attacker-controlled / (and subcodec rectangle offsets) to reach image copy routines that write into without bounds enforcement. The OOB write corrupts an adjacent struct's pointer with attacker-controlled pixel data, and corruption of is sufficient to reach an indirect function pointer call ( at ) on a subsequent codec command — full instruction pointer (RIP) control demonstrated in exploitability harness. Users should upgrade to version 3.23.0 to receive a patch.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe freerdp/freerdpversion unspecified

How to fix CVE-2026-26955

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-26955. EPSS is 0.57%. Act only if a listed version of FreeRDP is a free is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-787: Out-of-bounds Write; CWE-805. EPSS 0.57%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 25, 2026 · NIST NVD

    Detected

    FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a malicious RDP server can trigger a heap buffer overflow in FreeRDP clients using the GDI surface pipeline (e.g., ) by sending an RDPGFX ClearCodec surface command with an out-of-bounds destination rectangle. The handler does not call to validate the command rectangle against the destination surface dimensio

  2. Jul 15, 2026 · NIST NVD

    Updated

    FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a malicious RDP server can trigger a heap buffer overflow in FreeRDP clients using the GDI surface pipeline (e.g., ) by sending an RDPGFX ClearCodec surface command with an out-of-bounds destination rectangle. The handler does not call to validate the command rectangle against the destination surface dimensio

Sources

  • CVE.orgVulnerability recordCVE-2026-26955

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-26955

    30-day exploitation probability 0.6%

    first.org
  • NIST NVDVulnerability recordCVE-2026-26955

    FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a malicious RDP server can trigger a heap buffer overflow in FreeRDP clients using the GDI surface pipeline (e.g., ) by sending an RDPGFX ClearCodec surface command with an out-of-

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.