CVE-2018-5542
No exploitation reported by the sources we read.
- Published2018-07-25
- WeaknessCWE-20
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
F5 BIG-IP 13.0.0-13.0.1, 12.1.0-12.1.3.6, or 11.2.1-11.6.3.2 HTTPS health monitors do not validate the identity of the monitored server.
Timeline
dates in UTC- 2018-07-2514:29CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-5542?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-5542?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 11.x | ≥ 11.2.1, ≤ 11.6.3 | no fix published | NVD |
| 12.1 | ≥ 12.1.0, ≤ 12.1.3 | no fix published | NVD |
| 13.0 | ≥ 13.0.0, ≤ 13.0.1 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 11.x | ≥ 11.2.1, ≤ 11.6.3 | no fix published | NVD |
| 12.1 | ≥ 12.1.0, ≤ 12.1.3 | no fix published | NVD |
| 13.0 | ≥ 13.0.0, ≤ 13.0.1 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 11.x | ≥ 11.2.1, ≤ 11.6.3 | no fix published | NVD |
| 12.1 | ≥ 12.1.0, ≤ 12.1.3 | no fix published | NVD |
| 13.0 | ≥ 13.0.0, ≤ 13.0.1 | no fix published | NVD |
10 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- support.f5.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.08.1read 2026-10-23
- NVDCVSS 2.06.8read 2026-10-23
- NVDweakness (CWE)CWE-20read 2026-10-23
- FIRST EPSSEPSS score1.2 %2026-10-22
Technical details
- CVSS v3 Vector
- CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2018-07-25
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2018-5542?
Is CVE-2018-5542 actively exploited?
What is the CVSS score for CVE-2018-5542?
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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.