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CVE-2026-57158

Freerdp out-of-bounds read

9.1 CRITICALPublic exploitEPSS 0.69%
  1. Published10 Jul 2026

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. From 3.21.0 before 3.28.0, FreeRDP clients using the GFX pipeline contain an incomplete fix for CVE-2026-23530 in planar_decompress_plane_rle_only in libfreerdp/codec/planar.c, allowing a malicious RDP server to send a truncated RDPGFX_CMDID_WIRETOSURFACE_1 planar payload that reads one byte past the input buffer. This issue is fixed in version 3.28.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

Freerdp≥ 3.21.0 < 3.28.0

Remediation

Fixed in
Freerdp≥ 3.28.0

References

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Frequently asked

Is CVE-2026-57158 being actively exploited?

CVE-2026-57158 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.69%.

How severe is CVE-2026-57158?

CVE-2026-57158 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.69% probability of exploitation.

Which products are affected by CVE-2026-57158?

Affected products include Freerdp.

How do I fix CVE-2026-57158?

Upgrade affected software to a fixed version, for example Freerdp 3.28.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.