AEGLIX vulnerability intelligence
CVE-2025-53521
CRITICAL · CVSS 9.3 · Analyzed
Published: 2025-10-15 · Updated: 2026-10-08 · Source: NVD
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Vulnerability overview
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.
Severity and scoring
- CVSS score
- 9.3 · CRITICAL
- CVSS version
- 4.0
- CVSS vector
- 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
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- F5 · BIG-IP
- Added to catalog
- 2026-03-27
- 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.
- CISA remediation due date
- 2026-03-30
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.10.8
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
From (inclusive): 16.1.0
Before (exclusive): 16.1.6.1
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
From (inclusive): 17.1.0
Before (exclusive): 17.1.3
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
From (inclusive): 17.5.0
Before (exclusive): 17.5.1.3
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://my.f5.com/manage/s/article/K000156741
Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53521
US Government Resource