Medium severity · published Mar 31, 2021
CVE-2021-23007
On BIG-IP versions 14.1.4 and 16.0.1.1, when the Traffic Management Microkernel (TMM) process handles certain undisclosed traffic, it may start dropping all fragmented IP traffic
5.3
CVSS
1.6%
EPSS
No
On KEV
Description
On BIG-IP versions 14.1.4 and 16.0.1.1, when the Traffic Management Microkernel (TMM) process handles certain undisclosed traffic, it may start dropping all fragmented IP traffic. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BA
Big-ip Access Policy Manager · F5
14.1.4; 16.0.1.1 · source: NVD
BA
Big-ip Advanced Firewall Manager · F5
14.1.4; 16.0.1.1 · source: NVD
BA
Big-ip Advanced Web Application Firewall · F5
14.1.4; 16.0.1.1 · source: NVD
BA
Big-ip Analytics · F5
14.1.4; 16.0.1.1 · source: NVD
BA
Big-ip Application Acceleration Manager · F5
14.1.4; 16.0.1.1 · source: NVD
BA
Big-ip Application Security Manager · F5
14.1.4; 16.0.1.1 · source: NVD
BD
Big-ip Ddos Hybrid Defender · F5
14.1.4; 16.0.1.1 · source: NVD
BD
Big-ip Domain Name System · F5
14.1.4; 16.0.1.1 · source: NVD
BE
Big-ip Edge Gateway · F5
14.1.4; 16.0.1.1 · source: NVD
BF
Big-ip Fraud Protection Service · F5
14.1.4; 16.0.1.1 · source: NVD
BG
Big-ip Global Traffic Manager · F5
14.1.4; 16.0.1.1 · source: NVD
BL
Big-ip Link Controller · F5
14.1.4; 16.0.1.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-23007
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-23007
Exploit
https://support.f5.com/csp/article/K37451543
More from Big-ip Access Policy Manager
9.8
CVE-2026-94127
BIG-IP APM OAuth vulnerability
9.8
CVE-2025-53521
BigIP APM Vulnerability
9.8
CVE-2023-46747
BIG-IP Configuration utility unauthenticated remote code execution vulnerability
9.8
CVE-2022-1388
F5 BIG-IP Missing Authentication Vulnerability
9.8
CVE-2021-22991
F5 BIG-IP Traffic Management Microkernel Buffer Overflow