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CVE Record

CVE-2018-13990: The WebUI of PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, 48xx versions prior to 1.35 is vulnerable to brute-force...

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.

HighCVSS 8.6Not KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw lets an unauthenticated network attacker repeatedly try WebUI passwords against certain Phoenix Contact FL SWITCH devices. If management access is reachable, weak or reused credentials could lead to switch administration access and operational disruption or data exposure. Exposure is most likely where affected FL SWITCH WebUI management interfaces are reachable from corporate, remote-access, or internet-connected networks. The source bundle does not provide populated CPEs or a complete affected-version inventory. Treat this as a high-priority OT management-plane issue if affected switches are reachable beyond a tightly controlled admin network. Prioritize exposure reduction and vendor-confirmed firmware remediation. Mitigation focus: Identify FL SWITCH 3xxx, 4xxx, and 48xx devices running firmware prior to 1.35.; Check Phoenix Contact and CISA guidance for the supported fixed release and upgrade path.; Restrict WebUI management access to trusted administration networks only..

Prepared

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2018-13990 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.6 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AC:L/AV:N/A:L/C:H/I:L/PR:N/S:U/UI:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.6CVSS 3.0HighCVSS:3.0/AC:L/AV:N/A:L/C:H/I:L/PR:N/S:U/UI:N3.94.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

8.6High
CVSS 3.0 vector shape for CVE-2018-13990Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AC:L/AV:N/A:L/C:H/I:L/PR:N/S:U/UI:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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