Security readout for executives and security teams
This is an old Cisco 12000 router denial-of-service issue. Under specific IOS 12.0 and Engine 2 line-card conditions, fragmented traffic sent to the router could bypass expected ACL fragment handling and crash or degrade service during a fragment flood. Exposure is limited to legacy Cisco 12000 environments matching the IOS 12.0, Engine 2 line-card, and compiled ACL conditions described in the CVE. Modern networks are unlikely to be affected unless this hardware remains in service. Treat as a targeted legacy infrastructure risk. It is not currently evidenced as actively exploited, but affected backbone routers could experience availability impact if still deployed and exposed. Mitigation focus: Check Cisco advisory GSR-ACL-pub.shtml for fixed releases and supported workarounds.; Inventory and prioritize replacement of any affected legacy Cisco 12000 routers.; Review whether Turbo ACL or compiled ACL behavior is enabled on exposed devices..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2001-0863 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
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
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-acl-outgoing-fragment(7551)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
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