CVE-2026-4962

UltraVNC Service version.dll uncontrolled search path

HIGH
7
CVSS Score
Published: March 27, 2026 at 05:05 PM UTC
Updated: June 17, 2026 at 10:57 AM UTC
2 products affected across 2 vendorsUltraVNCUltraVNC

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Severity
HIGH7
Exploit prediction
EPSS 0.2%
SSVC
PoC

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. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
1.6.0.0 ≤ v ≤ 1.6.4.01.6.01.6.11.6.21.6.31.6.4.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

SignaturePermissions RequiredVDB Entry
https://vuldb.com/?ctiid.353839
VDB EntryThird Party Advisory
https://vuldb.com/?id.353839
Third Party AdvisoryExploitVDB Entry
https://vuldb.com/?submit.777619

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7HIGHVulDB
Vector?

Quick Info

StatusANALYZED
CWE
CWE-426CWE-427

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