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    CVE-2026-4962

    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.

    Published:Mar 27, 2026
    Last Modified:Apr 29, 2026
    EPS:Mar 27, 2026
    EPSS Score:0.00006
    CVSS Score:7

    Affected Products

    Vendor
    Ultravnc
    Product
    Ultravnc
    Vendor
    Uvnc
    Product
    Ultravnc

    Exploits

    https://vuldb.com/?submit.777619

    Related CVEs

    CVE-2026-3787 (CVSS 6.4) — A weakness has been identified in UltraVNC 1.6.4.0 on Windows. This affects an unknown function in the library…
    CVE-2020-37134 (CVSS 4.6) — UltraVNC Viewer 1.2.4.0 contains a denial of service vulnerability that allows attackers to crash the applicat…
    CVE-2020-37133 (CVSS 6.7) — UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host configuration field …
    CVE-2020-37132 (CVSS 6.7) — UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in its password configuration properties …
    CVE-2010-5248 (CVSS 6.9) — Untrusted search path vulnerability in UltraVNC 1.0.8.2 allows local users to gain privileges via a Trojan hor…
    CVE-2009-0388 (CVSS 10) — Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC ser…
    CVE-2008-5001 (CVSS 9.3) — Multiple stack-based buffer overflows in multiple functions in vncviewer/FileTransfer.cpp in vncviewer for Ult…
    CVE-2008-0610 (CVSS 9.3) — Stack-based buffer overflow in the ClientConnection::NegotiateProtocolVersion function in vncviewer/ClientConn…
    CVE-2006-2206 (CVSS 10) — The MS-Logon authentication scheme in UltraVNC (aka Ultr@VNC) 1.0.1 uses weak encryption (XOR) for challenge/r…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High