Security readout for executives and security teams
CVE-2015-4191 is a denial-of-service issue in Cisco IOS XR 5.2.1. A malformed IPv6 packet can trigger a reload of the ipv6_io service, potentially disrupting network availability on affected devices. The public bundle does not provide a CVSS score, confirmed exploit activity, or detailed remediation text. Exposure is most likely on Cisco IOS XR 5.2.1 systems that process IPv6 traffic from untrusted or reachable networks. The provided affected-product metadata is incomplete, so verify against Cisco’s advisory and device inventories. Prioritize validation on core, edge, and service-provider routing infrastructure because availability impact can be business-visible. Urgency rises if affected IOS XR 5.2.1 devices process IPv6 from untrusted networks. Mitigation focus: Check Cisco advisory 39383 for fixed releases, workarounds, and platform-specific scope.; Identify and prioritize Cisco IOS XR 5.2.1 devices handling IPv6 traffic.; Reduce untrusted IPv6 exposure where operationally feasible and approved..
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-2015-4191 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
Products and packages named in the record
CWE details
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