AUGUST 4, 2026
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Case File

CVE-2021-22981

MEDIUM · CVSS 4.8 EPSS 0.54%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-02-12 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2021-22981
Severity
MEDIUM
CVSS
4.8
EPSS
0.54%
BIG-IP

Original NVD Description

On all versions of BIG-IP 12.1.x and 11.6.x, the original TLS protocol includes a weakness in the master secret negotiation that is mitigated by the Extended Master Secret (EMS) extension defined in RFC 7627. TLS connections that do not use EMS are vulnerable to man-in-the-middle attacks during renegotiation. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.