AUGUST 4, 2026
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Case File

CVE-2021-23000

HIGH · CVSS 7.5 EPSS 0.93%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-03-31 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.5. It affects BIG-IP.

CVE
CVE-2021-23000
Severity
HIGH
CVSS
7.5
EPSS
0.93%
BIG-IP

Original NVD Description

On BIG-IP versions 13.1.3.4-13.1.3.6 and 12.1.5.2, if the tmm.http.rfc.enforcement BigDB key is enabled in a BIG-IP system, or the Bad host header value is checked in the AFM HTTP security profile associated with a virtual server, in rare instances, a specific sequence of malicious requests may cause TMM to restart. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Related CVEs

Other vulnerabilities affecting the same vendor(s)