How severe is CVE-2016-8366?

CVE-2016-8366 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2016-8366 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-8366?

CVE-2016-8366 affects Phoenixcontact Ilc Plcs Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-8366?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-8366 published?

CVE-2016-8366 was published on 2018-04-05 and last updated on 2026-06-17.

CVE-2016-8366

CVE-2016-8366 is a high-severity vulnerability in Phoenixcontact Ilc Plcs Firmware with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-255.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 5.0
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-255
Affected product: Phoenixcontact Ilc Plcs Firmware
Published: 2018-04-05
Last modified: 2026-06-17

Description

Webvisit in Phoenix Contact ILC PLCs offers a password macro to protect HMI pages on the PLC against casual or coincidental opening of HMI pages by the user. The password macro can be configured in a way that the password is stored and transferred in clear text.

Frequently asked questions

What is CVE-2016-8366?: Webvisit in Phoenix Contact ILC PLCs offers a password macro to protect HMI pages on the PLC against casual or coincidental opening of HMI pages by the user. The password macro can be configured in a way that the password is stored and transferred in clear text.
How severe is CVE-2016-8366?: CVE-2016-8366 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2016-8366 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-8366?: CVE-2016-8366 affects Phoenixcontact Ilc Plcs Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-8366?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-8366 published?: CVE-2016-8366 was published on 2018-04-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:phoenixcontact:ilc_plcs_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Phoenixcontact Ilc Plcs Firmware

CVE-2016-8380 — High (CVSS 7.3): The web server in Phoenix Contact ILC PLCs allows access to read and write PLC variables without authentication.
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