CVE-2018-5503 json
On F5 BIG-IP versions 13.0.0 - 13.1.0.3 or 12.0.0 - 12.1.3.1, TMM may restart when processing a specifically crafted page through a virtual…
published 2018-03-22 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-17272
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 77%
- public exploits
- 0
- none known
Summary
On F5 BIG-IP versions 13.0.0 - 13.1.0.3 or 12.0.0 - 12.1.3.1, TMM may restart when processing a specifically crafted page through a virtual server with an associated PEM policy that has content insertion as an action.
Patch / fix
- f5 big-ip_policy_enforcement_manager 12.1.3.2, 13.1.0.4
Exploit prediction
1.68% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- F5 Networks, Inc. BIG-IP (PEM)
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
support.f5.com
/csp/article/K54562183
vendor-advisory
-
securitytracker.com
/id/1040560
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2018-5503
- NVD CVE-2018-5503
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.