How severe is CVE-2020-12000?

CVE-2020-12000 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-12000 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12000?

CVE-2020-12000 affects Inductiveautomation Ignition Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-12000?

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-2020-12000 published?

CVE-2020-12000 was published on 2020-06-09 and last updated on 2026-06-17.

CVE-2020-12000

CVE-2020-12000 is a high-severity vulnerability in Inductiveautomation Ignition Gateway with a CVSS 3.x base score of 7.5. 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-502.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Inductiveautomation Ignition Gateway
Published: 2020-06-09
Last modified: 2026-06-17

Description

The affected product is vulnerable to the handling of serialized data. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data on the Ignition 8 Gateway (versions prior to 8.0.10) and Ignition 7 Gateway (versions prior to 7.9.14), allowing an attacker to obtain sensitive information.

Frequently asked questions

What is CVE-2020-12000?: The affected product is vulnerable to the handling of serialized data. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data on the Ignition 8 Gateway (versions prior to 8.0.10) and Ignition 7 Gateway (versions prior to 7.9.14), allowing an attacker to obtain sensitive information.
How severe is CVE-2020-12000?: CVE-2020-12000 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-12000 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12000?: CVE-2020-12000 affects Inductiveautomation Ignition Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-12000?: 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-2020-12000 published?: CVE-2020-12000 was published on 2020-06-09 and last updated on 2026-06-17.

References

https://www.us-cert.gov/ics/advisories/icsa-20-147-01

Affected products (1)

cpe:2.3:a:inductiveautomation:ignition_gateway:*:*:*:*:*:*:*:*

More vulnerabilities in Inductiveautomation Ignition Gateway

CVE-2020-14520 — High (CVSS 7.5): The affected product is vulnerable to an information leak, which may allow an attacker to obtain sensitive information…
CVE-2020-12004 — High (CVSS 7.5): The affected product lacks proper authentication required to query the server on the Ignition 8 Gateway (versions prior…
CVE-2020-10644 — High (CVSS 7.5): The affected product lacks proper validation of user-supplied data, which can result in deserialization of untrusted…
CVE-2020-10641 — High (CVSS 7.5): An unprotected logging route may allow an attacker to write endless log statements into the database without space…

All CVEs affecting Inductiveautomation Ignition Gateway →

Other CWE-502 (Deserialization of Untrusted Data) vulnerabilities

CVE-2026-41104 — Critical (CVSS 10.0): Deserialization of untrusted data in Microsoft Planetary Computer Pro allows an unauthorized attacker to disclose…
CVE-2026-43633 — Critical (CVSS 10.0): HestiaCP versions 1.9.0 through 1.9.4 contain a deserialization vulnerability in the web terminal component caused by a…
CVE-2026-33819 — Critical (CVSS 10.0): Deserialization of untrusted data in Microsoft Bing allows an unauthorized attacker to execute code over a network.
CVE-2026-20131 — Critical (CVSS 10.0): A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software could…
CVE-2026-25632 — Critical (CVSS 10.0): EPyT-Flow is a Python package designed for the easy generation of hydraulic and water quality scenario data of water…
CVE-2025-14931 — Critical (CVSS 10.0): Hugging Face smolagents Remote Python Executor Deserialization of Untrusted Data Remote Code Execution Vulnerability.…

Browse all CWE-502 (Deserialization of Untrusted Data) vulnerabilities →