🛡️ CVE-2026-64621 — freerdp

🟠 CVSS 7.3 — High ⚠️ Exploit Public CWE-415 NVD
7.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

FreeRDP before 3.28.0 (affected 3.x through 3.27.1) contains a double-free vulnerability in freerdp_client_rdp_file_apply_to_settings() (client/common/file.c) when parsing the selectedmonitors field of a .rdp connection file. The MonitorIds array is allocated through the settings object, and a raw non-owning pointer to it is freed on the strtoul error path without clearing settings->MonitorIds, leaving it dangling; at teardown freerdp_settings_free() frees the same buffer again. An attacker who convinces a victim to open a crafted .rdp file with oversized monitor tokens can trigger a size-controlled double-free in any FreeRDP CLI client (xfreerdp/sdl-freerdp/wlfreerdp) in the default configuration.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity high, availability high.

Weakness class

CVE-2026-64621 is classified as CWE-415: Double Free. The same allocation is released twice, corrupting allocator bookkeeping.

Affected software

CVE-2026-64621 is recorded against 1 package.

  • freerdp (from 3.0.0 up to 3.28.0)

Timeline and source

Published on 20 July 2026 and last revised on 28 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
github.com
www.vulncheck.com
github.com

Details

Severity HIGH
CVSS Score 7.3
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
CWE CWE-415
Public Exploit ⚠️ Yes
Source NVD
Published 2026-07-20
Updated 2026-08-11
Modified 2026-07-28

Affected Packages

Software From version Fixed in
freerdp 3.0.0 3.28.0

Similar Threats

Exploit Protection

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CVE-2026-64621 carries CVSS 7.3 High rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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