# Unsafe reflection in Mitsubishi Electric Corporation EZSocket and others

CVE record · `CVE-2023-6943`

- **Identifiers:** `CVE-2023-6943`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** Mitsubishi
- **Weakness (CWE):** [CWE-470](https://cwe.mitre.org/data/definitions/470.html)
- **Tags:** [Code injection](https://agentprime.io/advisories/tag/code-injection.md)
- **Technologies:** [Mitsubishi Electric Corporation EZSocket](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-ezsocket.md) · [Mitsubishi Electric Corporation GT Designer3 Version1(GOT1000)](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-gt-designer3-version1-got1000.md) · [Mitsubishi Electric Corporation GT Designer3 Version1(GOT2000)](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-gt-designer3-version1-got2000.md) · [Mitsubishi Electric Corporation GX Works2](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-gx-works2.md) · [Mitsubishi Electric Corporation GX Works3](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-gx-works3.md) · [Mitsubishi Electric Corporation MELSOFT Navigator](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-melsoft-navigator.md) · [Mitsubishi Electric Corporation MT Works2](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-mt-works2.md) · [Mitsubishi Electric Corporation MX Component](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-mx-component.md) · [Mitsubishi Electric Corporation MX OPC Server DA/UA](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-mx-opc-server-da-ua.md)
- **Published:** 30 Jan 2024
- **Updated:** 19 Sept 2025
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Mitsubishi) at 30 Jan 2024, 09:09 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Mitsubishi Electric Corporation. Product: EZSocket.
  - affected: `3.0 to 5.92`
  - Other versions: unaffected
- Vendor: Mitsubishi Electric Corporation. Product: GT Designer3 Version1(GOT1000).
  - affected: `1.325P and prior`
  - Other versions: unaffected
- Vendor: Mitsubishi Electric Corporation. Product: GT Designer3 Version1(GOT2000).
  - affected: `1.320J and prior`
  - Other versions: unaffected
- Vendor: Mitsubishi Electric Corporation. Product: GX Works2.
  - affected: `1.11M to 1.626C`
  - Other versions: unaffected
- Vendor: Mitsubishi Electric Corporation. Product: GX Works3.
  - affected: `1.106L and prior`
  - Other versions: unaffected
- Vendor: Mitsubishi Electric Corporation. Product: MELSOFT Navigator.
  - affected: `1.04E to 2.102G`
  - Other versions: unaffected
- Vendor: Mitsubishi Electric Corporation. Product: MT Works2.
  - affected: `1.190Y and prior`
  - Other versions: unaffected
- Vendor: Mitsubishi Electric Corporation. Product: MX Component.
  - affected: `4.00A to 5.007H`
  - Other versions: unaffected
- Vendor: Mitsubishi Electric Corporation. Product: MX OPC Server DA/UA.
  - affected: `all versions`
  - Other versions: unaffected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 9.8 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (Mitsubishi)

- **CISA KEV:** Not listed.
- **EPSS:** 0.021, the 82nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 30 Jan 2024. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2023-6943](https://www.cve.org/CVERecord?id=CVE-2023-6943)
- [NVD: CVE-2023-6943](https://nvd.nist.gov/vuln/detail/CVE-2023-6943)

### References from the CNA

- <https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-020_en.pdf> (vendor-advisory)
- <https://jvn.jp/vu/JVNVU95103362> (government-resource)
- <https://www.cisa.gov/news-events/ics-advisories/icsa-24-030-02> (government-resource)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2023-6943>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2023-6943/>. Everything for agents: <https://agentprime.io/llms.txt>.