Is CVE-2023-39476 actively exploited?

No active exploitation of CVE-2023-39476 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-39476 be exploited remotely?

Yes. CVE-2023-39476 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-39476?

CVE-2023-39476 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-39476

CWE-502Published: May 3, 2024· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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.

NVD Source

Risk Analysis

Inductive Automation Ignition is vulnerable to remote code execution due to insecure deserialization of untrusted data within the JavaSerializationCodec class. An unauthenticated attacker can trigger this to execute code with SYSTEM privileges. This is a critical vulnerability with a CVSS score of 9.8.

There is no known public exploit for this vulnerability, and it is not in the CISA KEV. It is remotely exploitable with low attack complexity.

Recommended Action

Upgrade to the latest version of Inductive Automation Ignition. Implement network segmentation to limit exposure of the Ignition platform.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-39476 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.