CVE-2002-1968: Com21 DOXport 1100 series cable modem running firmware 2.1.1.106, and possibly other versions before 2.1.1....

Security readout for executives and security teams

This is a legacy cable modem issue. A Com21 DOXport 1100 modem may accept its operating configuration from an internal TFTP server, allowing someone already on the local network to alter modem settings if they can present a malicious configuration source. Exposure is likely limited to environments still running legacy Com21 DOXport 1100 series cable modems, especially on shared or weakly controlled internal networks. Evidence does not identify modern products or broader internet-facing exposure. Treat this as a legacy-network hygiene issue unless these modems remain operational. If present in production, prioritize isolation, firmware verification, and replacement planning because local users may alter network device behavior. Mitigation focus: Identify whether Com21 DOXport 1100 devices remain in service.; Check vendor or operator guidance for firmware newer than affected versions.; Restrict TFTP services to authorized infrastructure only..

Prepared

Jun 29, 2026, 19:43 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.