CVE-2021-23004
mediumpriority · track · 30EPSS 0.010 · 62 %ileEUUSEPSS · scored 2026-10-27
On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, 12.1.x before 12.1.5.3, and 11.6.x before 11.6.5.3, Multipath TCP (MPTCP) forwarding flows may be created on standard virtual servers without MPTCP enabled in the applied TCP profile. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (85)
Products and version ranges known to be affected.
- n/a BIG-IP≤ 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, 12.1.x before 12.1.5.3, 11.6.x before 11.6.5.3enisa_euvdEU
- f5 big-ip access policy manager11.6.1 → 11.6.5.3nvdUScpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
- f5 big-ip access policy manager12.1.0 → 12.1.5.3nvdUScpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
- f5 big-ip access policy manager13.1.0 → 13.1.3.6nvdUScpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
- f5 big-ip access policy manager14.1.0 → 14.1.4nvdUScpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
- f5 big-ip access policy manager15.1.0 → 15.1.2.1nvdUScpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
- f5 big-ip access policy manager16.0.0 → 16.0.1.1nvdUScpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
- f5 big-ip advanced firewall manager11.6.1 → 11.6.5.3nvdUScpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
- f5 big-ip advanced firewall manager12.1.0 → 12.1.5.3nvdUScpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
- f5 big-ip advanced firewall manager13.1.0 → 13.1.3.6nvdUScpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
- f5 big-ip advanced firewall manager14.1.0 → 14.1.4nvdUScpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
- f5 big-ip advanced firewall manager15.1.0 → 15.1.2.1nvdUScpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
- f5 big-ip advanced firewall manager16.0.0 → 16.0.1.1nvdUScpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
- f5 big-ip advanced web application firewall11.6.1 → 11.6.5.3nvdUScpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*
- f5 big-ip advanced web application firewall12.1.0 → 12.1.5.3nvdUScpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*
- f5 big-ip advanced web application firewall13.1.0 → 13.1.3.6nvdUScpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*
- f5 big-ip advanced web application firewall14.1.0 → 14.1.4nvdUScpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*
- f5 big-ip advanced web application firewall15.1.0 → 15.1.2.1nvdUScpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*
- f5 big-ip advanced web application firewall16.0.0 → 16.0.1.1nvdUScpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2021-23004cnnvd
- https://support.f5.com/csp/article/K31025212cnnvd
- https://vigilance.fr/vulnerability/F5-BIG-IP-denial-of-service-via-MPTCP-34809cnnvd
- https://www.auscert.org.au/bulletins/ESB-2021.0866cnnvd
- https://support.f5.com/csp/article/K31025212enisa_euvd
- https://support.f5.com/csp/article/K31025212Vendor Advisorynvd
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