PT-2026-29133 · Freerdp · Freerdp

Sebasteuo · Published 2026-01-01 · Updated 2026-04-28 · CVE-2026-33952

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions FreeRDP versions prior to 3.24.2

Description FreeRDP is a free implementation of the Remote Desktop Protocol. An unvalidated auth length field read from the network triggers a WINPR ASSERT() failure in the rts read auth verifier no checks() function, causing FreeRDP clients connecting through a malicious RDP Gateway to crash. This is a pre-authentication denial of service affecting clients using RPC-over-HTTP gateway transport. The assertion is active in default release builds.

Recommendations Update to version 3.24.2 or later.

Exploit

Fix

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

BDU:2026-04667

CVE-2026-33952

GHSA-4V4P-9V5X-HC93

OPENSUSE-SU-2026:10633-1

OPENSUSE-SU-2026:20657-1

SUSE-SU-2026:21436-1

Affected Products

Freerdp

References · 23

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33952.json · Exploit
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4v4p-9v5x-hc93 · Vendor Advisory
• https://github.com/FreeRDP/FreeRDP/commit/4ac0b6467d371a1ad47c1f751c5b305e4c068adb · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-33952 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-33952 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10633-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-33952 · Security Note
• https://osv.dev/vulnerability/CVE-2026-33952 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33952 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-33952 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-33952 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-04667 · Security Note
• https://altsp.su/obnovleniya-bezopasnosti · Note
• https://suse.com/security/cve/CVE-2026-33982 · Note
• https://suse.com/security/cve/CVE-2026-33977 · Note