The web server in Phoenix Contact ILC PLCs can be accessed without authenticating even if the authentication mechanism is enabled.

published 2018-04-05 8 y ago modified 2026-06-17 4 mo ago also EUVD-2016-9219

cvss: 7.3; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 10.9%; EPSS 10.9% chance of exploitation in 30 days, percentile 95%
public exploits: 1; Exploit-DB

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-16-313-01 updated 2025-06-05 cvss 7.3

Phoenix Contact ILC PLC Authentication Vulnerabilities

Phoenix Contact ILC 1xx PLCs
affected: mitigation “For more information on this vulnerability and the associated update and mitigation strategies, please email Phoenix Contact at the following address: (mailto:automation-service@phoenixcontact.com)”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Timeline

2018-04-05 Published
2018-10-12 First public exploit (EDB-45590)

Exploit prediction

10.85% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

EDB-45590 Phoenix Contact WebVisit 2985725 - Authentication Bypass webapps, 2018-10-12

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.3	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

Phoenix Contact Phoenix Contact ILC PLCs

Classification

Weakness

CWE-592 DEPRECATED: Authentication Bypass Issues
CWE-287 Improper Authentication

References

exploit-db.com /exploits/45590/
exploit
ics-cert.us-cert.gov /advisories/ICSA-313-01
third-party-advisory, us-government-resource
securityfocus.com /bid/94163
vdb-entry, third-party-advisory

Sources

CVE List CVE-2016-8371
NVD CVE-2016-8371

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.

Summary