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    Vulnerabilities

    CVE-2006-2369

    RealVNC 4.1.1, and other products that use RealVNC such as AdderLink IP and Cisco CallManager, allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server, as originally demonstrated using a long password.

    Last Modified: Apr 16, 2026
    Published: May 15, 2006

    CVE-2004-1750

    RealVNC 4.0 and earlier allows remote attackers to cause a denial of service (crash) via a large number of connections to port 5900.

    Last Modified: Apr 16, 2026
    Published: Dec 31, 2004
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