CVE-2016-8371

Exp

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

Published: 2018-04-05 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-8371 is rated High Exploit Risk (73.4/100): CVSS High severity, with high exploitation likelihood (EPSS 12.53%, 94th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2016-8371

EDB-ID Source Kind Published Link
45590 exploit_db edb 2018-10-12 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2016-8371

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-01 16.12% 12.53% -3.58%
2 2026-01-26 24.34% 16.12% -8.22%
3 2025-03-30 — 24.34% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-8371

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.3 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 3.4 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2016-8371

Affected software / configurations for CVE-2016-8371

Vendor Product Version Raw CPE
phoenixcontact ilc_plcs_firmware — cpe:2.3:o:phoenixcontact:ilc_plcs_firmware:-:*:*:*:*:*:*:*

References for CVE-2016-8371

URL Tags
http://www.securityfocus.com/bid/94163 Third Party Advisory VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-313-01 Third Party Advisory US Government Resource
https://www.exploit-db.com/exploits/45590/
cvelogic Threat Intelligence