CVE-2023-39476

Name: CVE-2023-39476
Creator: NVD / NIST
Published: 2024-05-03T03:15:13.757+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.78%

Last modified Jun 17, 2026

CVE-2023-39476 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Inductive Automation Ignition JavaSerializationCodec Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Inductive Automation Ignition. EPSS estimates a 1.78% chance of exploitation in the next 30 days.

Description

Inductive Automation Ignition JavaSerializationCodec Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Inductive Automation Ignition. Authentication is not required to exploit this vulnerability. The specific flaw exists within the JavaSerializationCodec class. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-20291.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.78%

75.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Inductiveautomation	Ignition	>= 8.1.0, < 8.1.35

References

https://www.zerodayinitiative.com/advisories/ZDI-23-1046/Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-23-1046/Third Party Advisory

Timeline

Published: May 3, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-39476?

How severe is CVE-2023-39476?

CVE-2023-39476 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.78% probability of exploitation in the next 30 days.

How do I fix CVE-2023-39476?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-39476?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST