CVE-2026-4962CWE-426CWE-427

UltraVNC Service version.dll uncontrolled search path

High · published March 27, 2026

CVSS v4.0
7.3
EPSS
0%
Percentile
7.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.3 · HIGH
Vector
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
EPSS
0.00187 · 7.9th percentile
Weaknesses
CWE-426 · Untrusted Search Path; CWE-427 · Uncontrolled Search Path Element
Published
2026-03-27T17:05Z
EPSS history
Timeline
  • 27 MAR 17:05Z
    UltraVNC Service version.dll uncontrolled search path
    cvelistv5