CVE-2016-6421
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.
Does this matter?
Lower severity and a low EPSS score (1.60%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.0
- 5.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 1.60% probability · 76th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-399
- Affected
- cisco/ios xr
- Source
- psirt@cisco.com
EPSS 1.6% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-ospfVendor Advisory
- http://www.securityfocus.com/bid/93212
- http://www.securitytracker.com/id/1036909
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-ospfVendor Advisory
- http://www.securityfocus.com/bid/93212
- http://www.securitytracker.com/id/1036909
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.