Buffer overflow in Netscape Communicator before 4.7 via a dynamic font whose length field is less than the size of the font.

Netscape Communicator 4.04 through 4.7 (and possibly other versions) in various UNIX operating systems converts the 0x8b character to a "<" sign, and the 0x9b character to a ">" sign, which could allow remote attackers to attack other clients via cross-site scripting (CSS) in CGI programs that do not filter these characters.

Buffer overflow in Netscape Communicator via EMBED tags in the pluginspage option.

talkback in Netscape 4.5 allows a local user to kill an arbitrary process of another user whose Netscape crashes.

talkback in Netscape 4.5 allows a local user to overwrite arbitrary files of another user whose Netscape crashes.

The byte code verifier component of the Java Virtual Machine (JVM) allows remote execution through malicious web pages.

Java in Netscape 4.5 does not properly restrict applets from connecting to other hosts besides the one from which the applet was loaded, which violates the Java security model and could allow remote attackers to conduct unauthorized activities.

The view-source CGI program allows remote attackers to read arbitrary files via a .. (dot dot) attack.