Vulnerability · Published Mar 27, 2026 · Assigned by VulDB
CVE-2026-4962UltraVNC Service version.dll uncontrolled search path
High 7.0
In plain English
A high-severity uncontrolled search path in UltraVNC. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Official description
A security flaw has been discovered in UltraVNC up to 1.6.4.0. Affected by this issue is some unknown functionality in the library version.dll of the component Service. The manipulation results in uncontrolled search path. The attack needs to be approached locally. This attack is characterized by high complexity. The exploitation is known to be difficult. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Affected products (as reported)
Weakness: CWE-427, CWE-426 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-353839 | UltraVNC Service version.dll uncontrolled search path vdb-entry
- VDB-353839 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- Submit #777619 | UltraVNC 1.6.4.0 Uncontrolled Search Path-Privilege escalation with version.dll third-party-advisory
- https://drive.google.com/file/d/1QC-MrqGsfjr4phEN77krLFZHQN8S48U_/view exploit