CVE-2023-4699 | Arbitrary Command Execution Vulnerability in Mitsubishi Electric proprietary protocol communication of multiple FA products

Missing Authentication for Critical Function vulnerability in Mitsubishi Electric Corporation MELSEC-F Series CPU modules, MELSEC iQ-F Series, MELSEC iQ-R series CPU modules, MELSEC iQ-R series, MELSEC iQ-L series, MELSEC Q series, MELSEC-L series, Mitsubishi Electric CNC M800V/M80V series, Mitsubishi Electric CNC M800/M80/E80 series and Mitsubishi Electric CNC M700V/M70V/E70 series allows a remote unauthenticated attacker to execute arbitrary commands by sending specific packets to the affected products. This could lead to disclose or tamper with information by reading or writing control programs, or cause a denial-of-service (DoS) condition on the products by resetting the memory contents of the products to factory settings or resetting the products remotely.

Published: 2023-11-06 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-4699 is rated Moderate Risk (56.9/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.75%). 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-2023-4699

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 1.31% 0.75% -0.56%
2 2026-05-14 0.91% 1.31% +0.40%
3 2025-11-21 — 0.91% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-4699

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
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 6.0 [email protected]
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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:N)
Doesn’t really leak secrets in a meaningful 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 5.2 [email protected]

Weakness enumeration for CVE-2023-4699

Affected software / configurations for CVE-2023-4699

Vendor Product Version Raw CPE
mitsubishielectric fx3u-32mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-32mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-48mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-48mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-64mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-64mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-80mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-80mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-128mt\/e_firmware — cpe:2.3:o:mitsubishielectric:fx3u-128mt\/e_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-16mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-16mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-16mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-16mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-32mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-32mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-48mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-48mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-64mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-64mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-80mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-80mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-128mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-128mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-16mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3u-16mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-32mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3u-32mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-48mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3u-48mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-64mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3u-64mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-80mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3u-80mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-128mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3u-128mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-16mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3u-16mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-32mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3u-32mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-48mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3u-48mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-64mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3u-64mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-80mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3u-80mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-128mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3u-128mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-16mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3u-16mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-32mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3u-32mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-48mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3u-48mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-64mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3u-64mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-80mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3u-80mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-128mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3u-128mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-16mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3u-16mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-32mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3u-32mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-48mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3u-48mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-64mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3u-64mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-80mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3u-80mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-128mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3u-128mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-32mr\/ua1_firmware — cpe:2.3:o:mitsubishielectric:fx3u-32mr\/ua1_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-64mr\/ua1_firmware — cpe:2.3:o:mitsubishielectric:fx3u-64mr\/ua1_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-32ms\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-32ms\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-64ms\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3u-64ms\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-16mt\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3u-16mt\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-32mt\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3u-32mt\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-48mt\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3u-48mt\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-64mt\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3u-64mt\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-80mt\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3u-80mt\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-128mt\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3u-128mt\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-16mr\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3u-16mr\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-32mr\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3u-32mr\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-48mr\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3u-48mr\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-64mr\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3u-64mr\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-80mr\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3u-80mr\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3u-128mr\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3u-128mr\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-16mt\/d_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-16mt\/d_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-32mt\/d_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-32mt\/d_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-64mt\/d_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-64mt\/d_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-96mt\/d_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-96mt\/d_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-16mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-16mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-32mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-32mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-64mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-64mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-96mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-96mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-16mr\/d-t_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-16mr\/d-t_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-16mr\/ds-t_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-16mr\/ds-t_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-32mt-lt_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-32mt-lt_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-32mt-lt-2_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-32mt-lt-2_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-16mt\/d-p4_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-16mt\/d-p4_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3uc-16mt\/dss-p4_firmware — cpe:2.3:o:mitsubishielectric:fx3uc-16mt\/dss-p4_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24mt\/ds_firmware:-:*:*:*:*:*:*:*

References for CVE-2023-4699

cvelogic Threat Intelligence