UpHeron
All vulnerabilities

Servers and applications

CVE-2021-22981

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…

Severity
Medium 4.8
Published
12 Feb 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
F5 BIG-IPServers and applications · cpe:a:f5:big-ip_access_policy_manager
  • From 11.6.1 up to 11.6.5
  • From 12.1.0 up to 12.1.5
F5 BIG-IPServers and applications · cpe:a:f5:big-ip_local_traffic_manager
  • From 11.6.1 up to 11.6.5
  • From 12.1.0 up to 12.1.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-22981
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-22981