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    CVE-2022-24750

    UltraVNC is a free and open source remote pc access software. A vulnerability has been found in versions prior to 1.3.8.0 in which the DSM plugin module, which allows a local authenticated user to achieve local privilege escalation (LPE) on a vulnerable system. The vulnerability has been fixed to allow loading of plugins from the installed directory. Affected users should upgrade their UltraVNC to 1.3.8.1. Users unable to upgrade should not install and run UltraVNC server as a service. It is advisable to create a scheduled task on a low privilege account to launch WinVNC.exe instead. There are no known workarounds if winvnc needs to be started as a service.

    Published:Mar 10, 2022
    Last Modified:Apr 23, 2025
    EPS:Mar 10, 2022
    EPSS Score:0.00069
    CVSS Score:8.8

    Affected Products

    Vendor
    Uvnc
    Product
    Ultravnc

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-269 Improper Privilege Management

    Related CVEs

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    CVE-2026-7831 (CVSS 7.6) — UltraVNC viewer through 1.8.2.2 contains an off-by-one stack buffer overflow in the RFB ServerInit message han…
    CVE-2026-7830 (CVSS 7.4) — UltraVNC through 1.8.2.2 uses inadequate cryptography in the MS-Logon II authentication scheme (rfbUltraVNC_Ms…
    CVE-2026-7829 (CVSS 7.2) — UltraVNC repeater through 1.8.2.2 contains a post-authentication out-of-bounds write in the allow/deny rule pa…
    CVE-2026-7828 (CVSS 5.3) — UltraVNC repeater through 1.8.2.2 contains an integer overflow in the HTTP request logging path. In repeater/w…
    CVE-2026-44040 (CVSS 4.8) — UltraVNC through 1.8.2.2 uses a cryptographically weak pseudo-random number generator to produce VNC authentic…
    CVE-2026-44041 (CVSS 4.3) — UltraVNC through 1.8.2.2 contains an out-of-bounds read in the wide-string to multibyte conversion helper. In …
    CVE-2026-44042 (CVSS 3.7) — UltraVNC repeater through 1.8.2.2 contains an off-by-one error in the Base64 decode helper used for HTTP Basic…

    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