TI-2025-33465 Aliases CVE-2025-53521 GHSA-j3cp-7wh4-9f6c

BigIP APM Vulnerability

CRITICAL 99Exploited in the wildCWE-121Published 2025-10-15 · Updated 2026-03-31

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

When a BIG-IP APM access policy is configured on a virtual server, specific malicious traffic can lead to Remote Code Execution (RCE). Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Why it matters now

Exploitation Active In CISA KEV since 2026-03-27CISA due date 2026-03-30

EPSS 0.02295 83rd percentileScored 2026-11-07

Fix Fixed BIG-IP (F5): 17.5.1.3, 17.1.3, 16.1.6.1 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Active
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
F5	BIG-IP	17.5.0 to before 17.5.1.3; 17.1.0 to before 17.1.3; 16.1.0 to before 16.1.6.1; 15.1.0 to before 15.1.10.8	17.5.1.3, 17.1.3, 16.1.6.1, 15.1.10.8	Patch available	CNA

BIG-IP VendorF5 Affected 17.5.0 to before 17.5.1.3; 17.1.0 to before 17.1.3; 16.1.0 to before 16.1.6.1; 15.1.0 to before 15.1.10.8 Fixed in 17.5.1.3, 17.1.3, 16.1.6.1, 15.1.10.8 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:f5:big-ip_access_policy_manager::::::::	15.1.0 to before 15.1.10.8; 16.1.0 to before 16.1.6.1; 17.1.0 to before 17.1.3; 17.5.0 to before 17.5.1.3	Vulnerable	F5

cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* Versions 15.1.0 to before 15.1.10.8; 16.1.0 to before 16.1.6.1; 17.1.0 to before 17.1.3; 17.5.0 to before 17.5.1.3 Vulnerable ·F5

Remediation

Fix · CNA BIG-IP (F5) Fixed in 17.5.1.3, 17.1.3, 16.1.6.1, 15.1.10.8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2025-10-15
F5 BIG-IP 15.1.10.8, 16.1.6.1 and 2 more versions
13 records Highest priority Priority CRITICAL 1 CRITICAL, 7 MEDIUM, 5 LOW
Other records, highest priority first
- TI-2025-38317 TMM vulnerabilityPriority MEDIUM 44
- TI-2025-38308 BIG-IP SSL/TLS vulnerabilityPriority MEDIUM 44
- TI-2025-34592 BIG-IP Advanced WAF and ASM vulnerabilityPriority MEDIUM 44
Show all 13 records →

Timeline

2026-03-27 Added to CISA KEV
2026-10-02 Threatist record created from CVE-2025-53521
2026-10-03 Alias added: GHSA-j3cp-7wh4-9f6c

References

Advisory 1

https://my.f5.com/manage/s/article/K000156741

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

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