What’s Vulnerable › Vulnerabilities

CVE-2016-6421

• Severity: medium (CVSS 5.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-10-05 · updated 2026-06-17
• Weakness: CWE-399

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.

Affected products

• Cisco IOS XR Software: 5.2.2

References

• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-ospf
• http://www.securityfocus.com/bid/93212
• http://www.securitytracker.com/id/1036909
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-ospf
• http://www.securityfocus.com/bid/93212
• http://www.securitytracker.com/id/1036909

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