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CVE-2025-53521

BigIP APM Vulnerability

Published: Oct 15, 2025Updated: Oct 21, 2025 Sources: CVE List NVDCWE-770
NVD MITRE
7.5CVSSHIGH
EPSS Score
2.2%
Top 19.4%
CISA KEV
Active Exploitation
Since Mar 27, 2026
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-770

Affected Products

BIG-IPF5
On-premNetwork Device
Networking Infrastructure / router-switch
big-ip access policy managerf5
On-premNetwork Device
Networking Infrastructure / firewall
big-ip advanced firewall managerf5
On-premSecurity Product
Networking Infrastructure / firewall
big-ip advanced web application firewallf5
On-premSecurity Product
Networking Infrastructure / firewall
big-ip analyticsf5
On-premNetwork Device
Networking Infrastructure / network-management
f5commercialUSNetworking Infrastructure
and 17 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Mar 27, 2026
Remediation due:Mar 30, 2026

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

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

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

Timeline

Published
Oct 15, 2025
Last Updated
Oct 21, 2025
Added to CISA KEV
Mar 27, 2026

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