CVE-2001-0740: 3COM OfficeConnect 812 and 840 ADSL Router 4.2, running OCR812 router software 1.1.9 and earlier, allows re...

Security readout for executives and security teams

This old CVE concerns 3Com OfficeConnect 812 and 840 ADSL routers. A remote attacker could crash or disrupt the router with malformed, overly long input, causing loss of connectivity. The sources do not provide CVSS scoring or confirmed active exploitation. Exposure is likely limited to legacy 3Com OfficeConnect 812/840 routers still deployed, especially if remote administration or affected services are reachable from untrusted networks. Modern environments are unlikely to use these devices, but forgotten edge equipment can persist. Handle as a legacy infrastructure risk. It is unlikely to affect modern assets, but any exposed unsupported router could cause business connectivity outages and should be isolated, updated if possible, or replaced. Mitigation focus: Identify any 3Com OfficeConnect 812/840 routers in service.; Check vendor or archival 3Com guidance for fixed OCR812 software.; Disable untrusted access to router management interfaces..

Prepared

Jul 1, 2026, 07:46 UTC (UTC+00:00)

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