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.
References (4)
Core 4
Core References
Vdb Entry vdb-entry
VDB-353839 | UltraVNC Service version.dll uncontrolled search path
https://vuldb.com/?id.353839
Signature, Permissions Required signature
permissions-required
VDB-353839 | CTI Indicators (IOB, IOC, TTP, IOA)
https://vuldb.com/?ctiid.353839
Third Party Advisory third-party-advisory
Submit #777619 | UltraVNC 1.6.4.0 Uncontrolled Search Path-Privilege escalation with version.dll
https://vuldb.com/?submit.777619
Scores
CVSS v3
7.0
EPSS
0.0023
EPSS Percentile
13.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-426
CWE-427
Status
published
Products (6)
n/a/UltraVNC
1.6.0
n/a/UltraVNC
1.6.1
n/a/UltraVNC
1.6.2
n/a/UltraVNC
1.6.3
n/a/UltraVNC
1.6.4.0
uvnc/ultravnc
1.6.0.0 - 1.6.4.0
Published
Mar 27, 2026
Tracked Since
Mar 29, 2026