CVE-2026-34352 | TigerVNC up to 1.16.1 x0vncserver Image.cxx permission assignment

VDB-353813 · CVE-2026-34352 · GCVE-0-2026-34352 TIGERVNC UP TO 1.16.1 X0VNCSERVER IMAGE.CXX PERMISSION ASSIGNMENT HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.8 $0-$5k 1.89+ Summaryinfo A vulnerability was found in TigerVNC up to 1.16.1. It has been classified as problematic. This impacts an unknown function of the file Image.cxx of the component x0vncserver. The manipulation leads to permission assignment. This vulnerability is listed as CVE-2026-34352. The attack must be carried out locally. There is no available exploit. Upgrading the affected component is recommended. Detailsinfo A vulnerability was found in TigerVNC up to 1.16.1 and classified as problematic. This issue affects an unknown code block of the file Image.cxx of the component x0vncserver. The manipulation with an unknown input leads to a permission assignment vulnerability. Using CWE to declare the problem leads to CWE-732. The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. Impacted is confidentiality, integrity, and availability. The summary by CVE is: In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions. The advisory is shared at openwall.com. The identification of this vulnerability is CVE-2026-34352 since 03/26/2026. The exploitation is known to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available. Upgrading to version 1.16.2 eliminates this vulnerability. Applying the patch 0b5cab169d847789efa54459a87659d3fd484393 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. Productinfo Name TigerVNC Version 1.16.0 1.16.1 License open-source Website Product: https://github.com/TigerVNC/tigervnc/ CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.9 VulDB Meta Temp Score: 6.8 VulDB Base Score: 5.3 VulDB Temp Score: 5.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 8.5 CNA Vector (MITRE): 🔒 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: Permission assignment CWE: CWE-732 / CWE-275 / CWE-266 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No 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: TigerVNC 1.16.2 Patch: 0b5cab169d847789efa54459a87659d3fd484393 Timelineinfo 03/26/2026 CVE reserved 03/27/2026 +1 days Advisory disclosed 03/27/2026 +0 days VulDB entry created 03/27/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: openwall.com Status: Confirmed CVE: CVE-2026-34352 (🔒) GCVE (CVE): GCVE-0-2026-34352 GCVE (VulDB): GCVE-100-353813 Entryinfo Created: 03/27/2026 07:25 Changes: 03/27/2026 07:25 (65) Complete: 🔍 Cache ID: 99:2D0:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸