CVE-2004-1776: Cisco IOS 12.1(3) and 12.1(3)T allows remote attackers to read and modify device configuration data via the...

Security readout for executives and security teams

This older Cisco IOS issue could let a remote attacker read or change network device configuration data through a DOCSIS-related SNMP read-write community string. That can affect router or cable infrastructure control, but the supplied sources do not provide CVSS scoring or evidence of active exploitation. Exposure is most likely on legacy Cisco IOS 12.1(3) or 12.1(3)T devices using DOCSIS/SNMP management behavior. Internet, provider, or broadly reachable management interfaces would raise urgency. Prioritize assessment if the organization still operates legacy Cisco IOS or cable/DOCSIS infrastructure. The business risk is configuration compromise of network devices, but urgency depends on whether affected devices remain deployed and reachable. Mitigation focus: Inventory Cisco IOS devices for versions 12.1(3) and 12.1(3)T.; Review Cisco's advisory for affected configurations and vendor-approved fixes.; Remove or change risky read-write SNMP community strings where vendor guidance permits..

Prepared

Jun 29, 2026, 22:16 UTC (UTC+00:00)

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