Is CVE-2023-39355 actively exploited?

No active exploitation of CVE-2023-39355 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-39355 be exploited remotely?

Yes. CVE-2023-39355 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-39355?

CVE-2023-39355 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-39355

CWE-416Published: August 31, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Versions of FreeRDP on the 3.x release branch before beta3 are subject to a Use-After-Free in processing `RDPGFX_CMDID_RESETGRAPHICS` packets. If `context->maxPlaneSize` is 0, `context->planesBuffer` will be freed. However, without updating `context->planesBuffer`, this leads to a Use-After-Free exploit vector. In most environments this should only result in a crash. This issue has been addressed in version 3.0.0-beta3 and users of the beta 3.x releases are advised to upgrade. There are no known workarounds for this vulnerability.

NVD Source

Risk Analysis

A use-after-free vulnerability exists in the FreeRDP 3.x beta branch during the processing of graphics reset packets. This critical flaw has a 9.8 CVSS score and is remotely exploitable.

No public exploit is known, and it is not in the CISA KEV. The vulnerability is remotely exploitable.

Recommended Action

Users of the 3.x beta branch should upgrade to version 3.0.0-beta3.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-39355 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.