CVE-2021-23039 json
On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3, 14.1.x before 14.1.2.8, and all versions of 13.1.x and 12.1.x, when IPSec is confi…
published 2021-09-14 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10157
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
Summary
On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3, 14.1.x before 14.1.2.8, and all versions of 13.1.x and 12.1.x, when IPSec is configured on a BIG-IP system, undisclosed requests from an authorized remote (IPSec) peer, which already has a negotiated Security Association, can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Patch / fix
- f5 big-ip_access_policy_manager 14.1.2.8, 15.1.3, 16.0.1.2
- f5 big-ip_advanced_firewall_manager 14.1.2.8, 15.1.3, 16.0.1.2
- f5 big-ip_analytics 14.1.2.8, 15.1.3, 16.0.1.2
- f5 big-ip_application_acceleration_manager 14.1.2.8, 15.1.3, 16.0.1.2
- f5 big-ip_application_security_manager 14.1.2.8, 15.1.3, 16.0.1.2
- f5 big-ip_domain_name_system 14.1.2.8, 15.1.3, 16.0.1.2
- f5 big-ip_fraud_protection_service 14.1.2.8, 15.1.3, 16.0.1.2
- f5 big-ip_global_traffic_manager 14.1.2.8, 15.1.3, 16.0.1.2
- f5 big-ip_link_controller 14.1.2.8, 15.1.3, 16.0.1.2
- f5 big-ip_local_traffic_manager 14.1.2.8, 15.1.3, 16.0.1.2
- f5 big-ip_policy_enforcement_manager 14.1.2.8, 15.1.3, 16.0.1.2
Exploit prediction
0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 7.1 | AV:N/AC:M/Au:N/C:N/I:N/A:C |
Affected products
- n/a BIG-IP
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
support.f5.com
/csp/article/K66782293
mitigation, vendor-advisory
Sources
- CVE List CVE-2021-23039
- NVD CVE-2021-23039
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.