CVE-2025-53521

critical · 9.3Actively exploited

On the CISA Known Exploited Vulnerabilities catalog

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Added 2026-03-27Remediation due 2026-03-30

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.

9.3

CVSS

2.3%

EPSS (exploit prob.)

82nd

EPSS percentile

2025-10-15

Published

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-121

Affected products

Vendor	Product	Affected versions
f5	big-ip_access_policy_manager	>= 15.1.0, < 15.1.10.8
f5	big-ip_access_policy_manager	>= 16.1.0, < 16.1.6.1
f5	big-ip_access_policy_manager	>= 17.1.0, < 17.1.3
f5	big-ip_access_policy_manager	>= 17.5.0, < 17.5.1.3

Check a specific version with /api/v1/cve/match.

References

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2025-53521