CVE-2018-13990
No exploitation reported by the sources we read.
- Published2019-05-06
- Fixed in1.35
- WeaknessCWE-287
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
The WebUI of PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, 48xx versions prior to 1.35 is vulnerable to brute-force attacks, because of Improper Restriction of Excessive Authentication Attempts.
Timeline
dates in UTC- 2019-05-0619:29CVE 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-2018-13990?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-13990?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 |
|---|---|---|---|
| 1.35 | < 1.35 | 1.35 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.35 | < 1.35 | 1.35 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.35 | < 1.35 | 1.35 | NVD |
26 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
PHOENIX CONTACT FL SWITCH
FL SWITCH 3xxx 4xxx and 48xx: versions prior to Version 1.35
Fix
- Update Phoenixcontact fl switch 3004t-fx firmware to 1.35
- Mitigation from the vendor CISA ICSA-19-024-02 · 1 productPhoenix Contact recommends that users of FL SWITCH devices with affected firmware versions update the firmware to Version 1.35 or higher, which fixes these vulnerabilities. The updated firmware may be downloaded from the managed switch product page on the Phoenix Contact website. Please see the CER…
- Mitigation from the vendor CISA ICSA-19-024-02 · 1 productPhoenix Contact also recommends that users using the Phoenix Contact managed FL SWITCH devices enable HTTP security.
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- CNACVSS 3.08.6read 2026-10-23
- NVDCVSS 3.09.8read 2026-10-23
- NVDCVSS 2.05read 2026-10-23
- NVDweakness (CWE)CWE-287read 2026-10-23
- FIRST EPSSEPSS score2.3 %2026-10-22
Technical details
- CVSS v3 Vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2019-05-06
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2018-13990?
Is CVE-2018-13990 actively exploited?
What is the CVSS score for CVE-2018-13990?
Running PHOENIX CONTACT FL SWITCH? Hear about its next vulnerability
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.