How severe is CVE-2023-6943?

CVE-2023-6943 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-6943 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-6943?

CVE-2023-6943 primarily affects Mitsubishielectric Ezsocket. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-6943?

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

Does CVE-2023-6943 have an EU (EUVD) identifier?

Yes. CVE-2023-6943 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-59140.

When was CVE-2023-6943 published?

CVE-2023-6943 was published on 2024-01-30 and last updated on 2026-06-17.

CVE-2023-6943

CVE-2023-6943 is a critical-severity vulnerability in Mitsubishielectric Ezsocket with a CVSS 3.x base score of 9.8. 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-470.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-59140
Weakness: CWE-470
Affected product: Mitsubishielectric Ezsocket
Published: 2024-01-30
Last modified: 2026-06-17

Description

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Mitsubishi Electric Corporation EZSocket versions 3.0 to 5.92, GT Designer3 Version1(GOT1000) versions 1.325P and prior, GT Designer3 Version1(GOT2000) versions 1.320J and prior, GX Works2 versions 1.11M to 1.626C, GX Works3 versions 1.106L and prior, MELSOFT Navigator versions 1.04E to 2.102G, MT Works2 versions 1.190Y and prior, MX Component versions 4.00A to 5.007H and MX OPC Server DA/UA all versions allows a remote unauthenticated attacker to execute a malicious code by RPC with a path to a malicious library while connected to the products.

Frequently asked questions

What is CVE-2023-6943?: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Mitsubishi Electric Corporation EZSocket versions 3.0 to 5.92, GT Designer3 Version1(GOT1000) versions 1.325P and prior, GT Designer3 Version1(GOT2000) versions 1.320J and prior, GX Works2 versions 1.11M to 1.626C, GX Works3 versions 1.106L and prior, MELSOFT Navigator versions 1.04E to 2.102G, MT Works2 versions 1.190Y and prior, MX Component versions 4.00A to 5.007H and MX OPC Server DA/UA all versions allows a remote unauthenticated attacker to execute a malicious code by RPC with a path to a malicious library while connected to the products.
How severe is CVE-2023-6943?: CVE-2023-6943 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-6943 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-6943?: CVE-2023-6943 primarily affects Mitsubishielectric Ezsocket. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-6943?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2023-6943 have an EU (EUVD) identifier?: Yes. CVE-2023-6943 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-59140.
When was CVE-2023-6943 published?: CVE-2023-6943 was published on 2024-01-30 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:a:mitsubishielectric:ezsocket:*:*:*:*:*:*:*:*
cpe:2.3:a:mitsubishielectric:fr_configurator2:*:*:*:*:*:*:*:*
cpe:2.3:a:mitsubishielectric:got1000:*:*:*:*:*:*:*:*
cpe:2.3:a:mitsubishielectric:got2000:*:*:*:*:*:*:*:*
cpe:2.3:a:mitsubishielectric:gx_works2:*:*:*:*:*:*:*:*
cpe:2.3:a:mitsubishielectric:gx_works3:*:*:*:*:*:*:*:*
cpe:2.3:a:mitsubishielectric:mc_works64:*:*:*:*:*:*:*:*
cpe:2.3:a:mitsubishielectric:melsoft_navigator:*:*:*:*:*:*:*:*
cpe:2.3:a:mitsubishielectric:mt_works2:*:*:*:*:*:*:*:*
cpe:2.3:a:mitsubishielectric:mx_component:*:*:*:*:*:*:*:*

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