CVE-2026-4962
UltraVNC Service version.dll uncontrolled search path
- State
- Published
- Severity
- 7.3 High
- Published
- Mar 27, 2026
- Updated
- Mar 27, 2026
- Reserved
- Mar 27, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.3 High | CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 7.0 High | 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 | VulDB |
| 3.0 | 7.0 High | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 2.0 | 6.0 Medium | AV:L/AC:H/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
UltraVNCn/a |
|
References
- VDB-353839 | UltraVNC Service version.dll uncontrolled search pathvdb-entry
- VDB-353839 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- Submit #777619 | UltraVNC 1.6.4.0 Uncontrolled Search Path-Privilege escalation with version.dllthird-party-advisory
- https://drive.google.com/file/d/1QC-MrqGsfjr4phEN77krLFZHQN8S48U_/viewexploit
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