CVE-2026-4962 | UltraVNC up to 1.6.4.0 Service version.dll uncontrolled search path

VDB-353839 · CVE-2026-4962 · GCVE-100-353839 ULTRAVNC UP TO 1.6.4.0 SERVICE VERSION.DLL UNCONTROLLED SEARCH PATH HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.4 $0-$5k 1.38 Summaryinfo A vulnerability has been found in UltraVNC up to 1.6.4.0 and classified as problematic. This affects an unknown part in the library version.dll of the component Service. This manipulation causes uncontrolled search path. The identification of this vulnerability is CVE-2026-4962. The attack can only be executed locally. Furthermore, there is an exploit available. The vendor was contacted early about this disclosure but did not respond in any way. Detailsinfo A vulnerability has been found in UltraVNC up to 1.6.4.0 and classified as critical. Affected by this vulnerability is an unknown part in the library version.dll of the component Service. The manipulation with an unknown input leads to a uncontrolled search path vulnerability. The CWE definition for the vulnerability is CWE-427. The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors. As an impact it is known to affect confidentiality, integrity, and availability. It is possible to read the advisory at drive.google.com. This vulnerability is known as CVE-2026-4962. The exploitation appears to be difficult. Attacking locally is a requirement. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1574 according to MITRE ATT&CK. It is possible to download the exploit at drive.google.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type Connectivity Software Name UltraVNC Version 1.6.0 1.6.1 1.6.2 1.6.3 1.6.4.0 License open-source CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.0 VulDB Meta Temp Score: 6.4 VulDB Base Score: 7.0 VulDB Temp Score: 6.4 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: Uncontrolled search path CWE: CWE-427 / CWE-426 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No Availability: 🔒 Access: Public Status: Proof-of-Concept Download: 🔒 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: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/27/2026 Advisory disclosed 03/27/2026 +0 days VulDB entry created 03/27/2026 +0 days VulDB entry last update Sourcesinfo Advisory: drive.google.com Status: Not defined CVE: CVE-2026-4962 (🔒) GCVE (CVE): GCVE-0-2026-4962 GCVE (VulDB): GCVE-100-353839 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 03/27/2026 09:18 Changes: 03/27/2026 09:18 (56) Complete: 🔍 Submitter: haehanse Cache ID: 99:F4D:101 Submitinfo Accepted Submit #777619: UltraVNC 1.6.4.0 Uncontrolled Search Path-Privilege escalation with version.dll (by haehanse) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸