CVE•Published 2025-10-15•1 article on news•5 live references•NVD data
CVE-2025-53521
Vulnerability data via CVEDB (Shodan)
CVSS v3.1
9.3
CRITICAL
EPSS percentile
82
Exploit Prediction Scoring System · top 18% of all CVEs
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.
Timeline
Published 2025-10-15
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2025-53521Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"F5 Big-ip Access Policy Manager" version:"15.1.0"Version-pinned fingerprint from NVD's first vulnerable CPE.
Shodan · banner/body mention
http.html:"Big-ip Access Policy Manager"HTTP body or banner mentions "Big-ip Access Policy Manager" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2025-53521Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-53521Censys host search filtered to this CVE id.
grep.app
CVE-2025-53521Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-53521GitHub code search for direct mentions.
Google dork
"CVE-2025-53521" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (5)
CVE-2025-535215 repos
opendr-io/causalityJupyter Notebook
The difference between exploitation prediction and detection is akin to the difference between detecting a missile launch or a detonation. Every avoided exploitation cycle saves hu…
MaikCyberSec/Threat-Hunting-unknown
Threat Hunting based on KQL
bodrick/awesome-starsunknown
rulezet/rulezet-scriptsPython
Scripts using rulezet
NiNiyas/awesome-starsunknown
Made with https://github.com/NiNiyas/starred