CVE-2025-52585: F5 BIG-IP · NULL Pointer Dereference
Affects F5 BIG-IPSource CVE Database V5
Not known to be exploited · CVSS 7.5 High.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 26% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 13 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| F5 BIG-IP | Affected
| Fixed in– |
AI-suggested
To mitigate this vulnerability, European organizations should: 1) Immediately review BIG-IP configurations to identify any virtual servers using Client SSL profiles with SSL Forward Proxy enabled and ADH ciphers allowed. 2) Disable Anonymous Diffie-Hellman (ADH) ciphers in SSL profiles, as these are weak and generally unnecessary for secure environments. 3) If SSL Forward Proxy functionality is not required, consider disabling it to reduce attack surface. 4) Monitor BIG-IP TMM process stability and logs for signs of crashes or unusual behavior. 5) Apply vendor patches or updates as soon as they become available; in the absence of patches, consider temporary workarounds such as removing ADH ciphers or disabling SSL Forward Proxy on affected devices. 6) Conduct thorough testing of SSL configurations to ensure compliance with best practices and eliminate legacy or weak cipher suites. 7) Implement network-level protections such as rate limiting and anomaly detection to identify and block malformed or suspicious SSL traffic that could trigger the vulnerability. 8) Maintain an inventory of BIG-IP devices and their firmware versions to prioritize remediation efforts.
Description
When a BIG-IP LTM Client SSL profile is configured on a virtual server with SSL Forward Proxy enabled and Anonymous Diffie-Hellman (ADH) ciphers enabled, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.