Security readout for executives and security teams
This is an old Cisco router access-control flaw. In a specific Cisco 12000 IOS 12.0 Engine 2 line-card configuration, traffic that should be blocked by outbound ACL policy could pass. The business concern is unauthorized network access where affected routers still enforce perimeter or backbone filtering. Exposure appears limited to legacy Cisco 12000 deployments using IOS 12.0 and Engine 2 multi-port line cards with the described ACL pattern. Modern networks are likely unaffected unless this hardware/software remains in service or is used in lab, backbone, or inherited environments. Prioritize if legacy Cisco 12000 routers still enforce access boundaries. If none exist, this is mainly an asset-discovery and records-cleanup issue. If present, treat as a meaningful network control bypass risk. Mitigation focus: Review Cisco advisory GSR-ACL-pub.shtml for affected releases and vendor-directed fixes.; Inventory Cisco 12000 routers for IOS 12.0 and Engine 2 line cards.; Audit ACL designs where outbound ACLs protect traffic on multi-port line cards..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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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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Source materials
- CVE List V5 sourceCVE List V5
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