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.

Published: 2024-01-30 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-6943 is rated Moderate Risk (63.7/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.84%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-6943

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 3.97% 1.84% -2.13%
2 2025-11-21 0.85% 3.97% +3.12%
3 2025-11-18 — 0.85% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-6943

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2023-6943

Affected software / configurations for CVE-2023-6943

Vendor Product Version Raw CPE
mitsubishielectric ezsocket >= 3.0 cpe:2.3:a:mitsubishielectric:ezsocket:*:*:*:*:*:*:*:*
mitsubishielectric fr_configurator2 — cpe:2.3:a:mitsubishielectric:fr_configurator2:*:*:*:*:*:*:*:*
mitsubishielectric got1000 — cpe:2.3:a:mitsubishielectric:got1000:*:*:*:*:*:*:*:*
mitsubishielectric got2000 — cpe:2.3:a:mitsubishielectric:got2000:*:*:*:*:*:*:*:*
mitsubishielectric gx_works2 >= 1.11m cpe:2.3:a:mitsubishielectric:gx_works2:*:*:*:*:*:*:*:*
mitsubishielectric gx_works3 — cpe:2.3:a:mitsubishielectric:gx_works3:*:*:*:*:*:*:*:*
mitsubishielectric mc_works64 — cpe:2.3:a:mitsubishielectric:mc_works64:*:*:*:*:*:*:*:*
mitsubishielectric melsoft_navigator >= 1.04e cpe:2.3:a:mitsubishielectric:melsoft_navigator:*:*:*:*:*:*:*:*
mitsubishielectric mt_works2 — cpe:2.3:a:mitsubishielectric:mt_works2:*:*:*:*:*:*:*:*
mitsubishielectric mx_component >= 4.00a cpe:2.3:a:mitsubishielectric:mx_component:*:*:*:*:*:*:*:*

References for CVE-2023-6943

cvelogic Threat Intelligence