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TI-2021-05840 Aliases CVE-2021-22981GHSA-q9r3-wvmc-78qp

On all versions of BIG-IP 12.1.x and 11.6.x, the original TLS protocol includes a…

Priority LOW 23Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.00562 47th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—BIG-IPAll versions of 12.1.x and 11.6.x—No fix listedCNA
  • BIG-IP Vendor— Affected All versions of 12.1.x and 11.6.x Fixed in — No fix listed CNA

CPE configurations NVD · 14

CPEVersionsRoleVendor
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
  • cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
Show 4 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:*11.6.1 – 11.6.5; 12.1.0 – 12.1.5VulnerableF5
  • cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5 Vulnerable ·F5

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-22981
  2. 2026-10-03 Alias added: GHSA-q9r3-wvmc-78qp

References

Advisory 1

  • TI-2023-25230 BIG-IP Configuration utility unauthenticated remote code execution vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-01269 Missing authentication in F5 BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-05850 Memory corruption in BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-05845 Server-side request forgery in BIG-IP; BIG-IQ KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-04820 Path traversal in BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
See all 629 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences