CVE-2025-53521

Published Oct 15, 2025

Last updated 19 days ago

Exploit known CVSS critical 9.3

BIG-IP APM

BIG-IP

IoT

Supply chain

Overview

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.
Source: f5sirt@f5.com
NVD status: Analyzed
Products: big-ip_access_policy_manager

Risk scores

CVSS 4.0

Type: Secondary
Base score: 9.3
Impact score: -
Exploitability score: -
Vector string: 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
Severity: CRITICAL

CVSS 3.1

Type: Secondary
Base score: 9.8
Impact score: 5.9
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: CRITICAL

Known exploits

Data from CISA

Vulnerability name: F5 BIG-IP Unspecified Vulnerability
Exploit added on: Mar 27, 2026
Exploit action 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.

Weaknesses

f5sirt@f5.com: CWE-121

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "A7A0C1CA-EDEF-463F-B7C8-8B9E67239FC1",
            "versionEndExcluding": "15.1.10.8",
            "versionStartIncluding": "15.1.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "6494E2A7-1473-46C0-97F8-90827D9466AA",
            "versionEndExcluding": "16.1.6.1",
            "versionStartIncluding": "16.1.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "96D35435-27A7-4A88-9432-1F5AB0112B8C",
            "versionEndExcluding": "17.1.3",
            "versionStartIncluding": "17.1.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "252ED1A4-5F29-4440-B1BA-9621E6791812",
            "versionEndExcluding": "17.5.1.3",
            "versionStartIncluding": "17.5.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.

Overview

Risk scores

CVSS 4.0

CVSS 3.1

Known exploits

Weaknesses

Social media

Configurations

Related CVEs

References