CVE-2016-6421

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.60% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 74.0% of scored records. A rank, not a probability.

NVD base score

5.3 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2016-10-05 20:00Z9 YR AGO

Last updated

2024-08-06 01:29Z2 YR AGO

Reserved

2016-07-26

Assigning CNA

cisco

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-399

Data version

5.1

Document digest

af2d77a251760b3681830346254598bb96c1eac0d7b903073da031d22d474d76

• tools.cisco.com20160928 Cisco IOS XR Software Open Shortest Path First Link State Advertisement Denial of Service Vulnerabilityhttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-ospfvendor-advisoryx_refsource_CISCO
• www.securityfocus.com93212http://www.securityfocus.com/bid/93212vdb-entryx_refsource_BID
• www.securitytracker.com1036909http://www.securitytracker.com/id/1036909vdb-entryx_refsource_SECTRACK