CVE-2021-22981
At a glance Severity Not available EPSS EPSS 0.56 % · percentile 46 (2026-10-27) State PUBLISHED Published 2021-02-12 Updated 2024-08-03 Assigner f5 NVD status Modified 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.
Scores Version Score Vector Scored by CVSS 3.1 MEDIUM 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N NVD · nvd@nist.gov (Primary) CVSS 2.0 MEDIUM 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N NVD · nvd@nist.gov (Primary)
European references
Affected configurations (NVD CPE) cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:* ≥ 11.6.1 ≤ 11.6.5cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:* ≥ 12.1.0 ≤ 12.1.5Affected products Product Versions BIG-IP affected All versions of 12.1.x and 11.6.x
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