Security readout for executives and security teams
This issue concerns a legacy Cisco 6400 Access Concentrator NRP2 running 12.1DC. If virtual terminal lines have no password configured, Telnet access may remain available instead of being disabled, allowing remote access. Business risk is highest where old carrier or network access infrastructure is still reachable over management networks. Exposure appears narrow: Cisco 6400 Access Concentrator NRP2 devices running 12.1DC with unset vty passwords and reachable Telnet. Modern environments are unlikely to be affected unless legacy network infrastructure remains in service or exposed on management paths. Prioritize if legacy Cisco 6400 infrastructure is still operating. The issue can permit remote management access under a specific misconfiguration, but evidence in the bundle is old and incomplete. Confirm asset existence first, then remediate exposed systems quickly. Mitigation focus: Identify whether any Cisco 6400 NRP2 12.1DC systems remain in service.; Check Cisco's vendor advisory for supported remediation or upgrade guidance.; Ensure vty access is not left without an approved password configuration..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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ATT&CK lookup starting points
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Credential and access behavior lookup
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Open ATT&CK lookupCVE-2001-0757 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- cisco-nrp2-telnet-access(6691)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
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