CVE-2026-33952 | FreeRDP up to 3.24.1 rts_read_auth_verifier_no_checks auth_length assertion

VDB-354273 · CVE-2026-33952 · EUVD-2026-17221 FREERDP UP TO 3.24.1 RTS_READ_AUTH_VERIFIER_NO_CHECKS AUTH_LENGTH ASSERTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.0 $0-$5k 2.59 Summaryinfo A vulnerability has been found in FreeRDP up to 3.24.1 and classified as problematic. The impacted element is the function rts_read_auth_verifier_no_checks. Performing a manipulation of the argument auth_length results in assertion. This vulnerability was named CVE-2026-33952. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded. Detailsinfo A vulnerability was found in FreeRDP up to 3.24.1. It has been classified as problematic. This affects the function rts_read_auth_verifier_no_checks. The manipulation of the argument auth_length with an unknown input leads to a assertion vulnerability. CWE is classifying the issue as CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. This is going to have an impact on availability. The summary by CVE is: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, an unvalidated auth_length field read from the network triggers a WINPR_ASSERT() failure in rts_read_auth_verifier_no_checks(), causing any FreeRDP client connecting through a malicious RDP Gateway to crash with SIGABRT. This is a pre-authentication denial of service affecting all FreeRDP clients using RPC-over-HTTP gateway transport. The assertion is active in default release builds (WITH_VERBOSE_WINPR_ASSERT=ON). This issue has been patched in version 3.24.2. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-33952 since 03/24/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. Upgrading to version 3.24.2 eliminates this vulnerability. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-17221). Productinfo Type Remote Access Software Name FreeRDP Version 3.24.0 3.24.1 License open-source Website Product: https://github.com/FreeRDP/FreeRDP/ CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 3.1 VulDB Meta Temp Score: 3.0 VulDB Base Score: 3.1 VulDB Temp Score: 3.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Assertion CWE: CWE-617 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: FreeRDP 3.24.2 Timelineinfo 03/24/2026 CVE reserved 03/30/2026 +6 days VulDB entry created 03/31/2026 +0 days Advisory disclosed 03/31/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-33952 (🔒) GCVE (CVE): GCVE-0-2026-33952 GCVE (VulDB): GCVE-100-354273 EUVD: 🔒 Entryinfo Created: 03/31/2026 00:20 Updated: 03/31/2026 03:38 Changes: 03/31/2026 00:20 (67), 03/31/2026 03:38 (1) Complete: 🔍 Cache ID: 99:37E:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸