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Medium severity5.3NVD Advisory· Published Oct 5, 2016· Updated Jun 17, 2026

CVE-2016-6421

CVE-2016-6421

Description

Cisco IOS XR 5.2.2 allows remote attackers to cause a denial of service (process restart) via a crafted OSPF Link State Advertisement (LSA) update, aka Bug ID CSCvb05643.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

2
  • Cisco Systems, Inc./iOS Xr2 versions
    cpe:2.3:o:cisco:ios_xr:5.2.2:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:ios_xr:5.2.2:*:*:*:*:*:*:*
    • (no CPE)range: 5.2.2

Patches

Vulnerability mechanics

References

3

News mentions

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