Multiple buffer overflows in DeleGate before 8.11.1 may allow attackers to cause a denial of service or execute arbitrary code, possibly due to "overflows on arrays."
Multiple buffer overflows in DeleGate 7.7.0 through 7.8.1 allow remote attackers to execute arbitrary code, as demonstrated using a long USER command to the POP proxy.
Cross-site scripting vulnerability in DeleGate 7.7.0 and 7.7.1 does not quote scripting commands within a "403 Forbidden" error page, which allows remote attackers to execute arbitrary Javascript on other clients via a URL that generates an error.