CVE-2023-4562 | Information Disclosure, Information Tampering and Authentication Bypass Vulnerability in MELSEC-F Series main module

Improper Authentication vulnerability in Mitsubishi Electric Corporation MELSEC-F Series main modules allows a remote unauthenticated attacker to obtain sequence programs from the product or write malicious sequence programs or improper data in the product without authentication by sending illegitimate messages.

Published: 2023-10-12 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-4562 is rated Moderate Risk (55.7/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.85%). 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-2023-4562

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 0.21% 0.85% +0.65%
2 2025-03-30 0.46% 0.21% -0.26%
3 2025-03-29 — 0.46% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-4562

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N 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:N)
Service keeps running; no real outage angle.
 3.9 5.2 [email protected]
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N 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:N)
Service keeps running; no real outage angle.
 3.9 5.2 [email protected]

Weakness enumeration for CVE-2023-4562

Affected software / configurations for CVE-2023-4562

Vendor Product Version Raw CPE
mitsubishielectric fx3g-14_mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14_mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14_mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14_mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14_mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14_mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14_mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14_mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14_mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14_mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14_mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14_mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14mr\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14mr\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14mt\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14mt\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-14mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3g-14mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-232adp\(-mb\)_firmware — cpe:2.3:o:mitsubishielectric:fx3g-232adp\(-mb\)_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24_mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24_mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24_mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24_mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24_mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24_mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24_mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24_mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24_mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24_mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24_mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24_mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24mr\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24mr\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24mt\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24mt\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-24mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3g-24mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-32_mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3g-32_mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-3a-adp_firmware — cpe:2.3:o:mitsubishielectric:fx3g-3a-adp_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40_mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40_mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40_mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40_mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40_mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40_mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40_mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40_mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40_mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40_mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40_mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40_mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40mr\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40mr\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40mt\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40mt\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-40mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3g-40mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-485adp\(-mb\)_firmware — cpe:2.3:o:mitsubishielectric:fx3g-485adp\(-mb\)_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-4ad-adp_firmware — cpe:2.3:o:mitsubishielectric:fx3g-4ad-adp_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-4ad-pt-adp_firmware — cpe:2.3:o:mitsubishielectric:fx3g-4ad-pt-adp_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-4ad-ptw-adp_firmware — cpe:2.3:o:mitsubishielectric:fx3g-4ad-ptw-adp_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-4ad-tc-adp_firmware — cpe:2.3:o:mitsubishielectric:fx3g-4ad-tc-adp_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-4da-adp_firmware — cpe:2.3:o:mitsubishielectric:fx3g-4da-adp_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-4da-pnk-adp_firmware — cpe:2.3:o:mitsubishielectric:fx3g-4da-pnk-adp_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60_mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60_mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60_mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60_mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60_mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60_mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60_mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60_mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60_mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60_mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60_mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60_mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60mr\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60mr\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60mt\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60mt\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60mt\/es-a_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60mt\/es-a_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-60mt\/ess_firmware — cpe:2.3:o:mitsubishielectric:fx3g-60mt\/ess_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3g-cnv-adp_firmware — cpe:2.3:o:mitsubishielectric:fx3g-cnv-adp_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3ga-24mr-cm_firmware — cpe:2.3:o:mitsubishielectric:fx3ga-24mr-cm_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3ga-24mt-cm_firmware — cpe:2.3:o:mitsubishielectric:fx3ga-24mt-cm_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3ga-40mr-cm_firmware — cpe:2.3:o:mitsubishielectric:fx3ga-40mr-cm_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3ga-40mt-cm_firmware — cpe:2.3:o:mitsubishielectric:fx3ga-40mt-cm_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3ga-60mr-cm_firmware — cpe:2.3:o:mitsubishielectric:fx3ga-60mr-cm_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3ga-60mt-cm_firmware — cpe:2.3:o:mitsubishielectric:fx3ga-60mt-cm_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3gc_firmware — cpe:2.3:o:mitsubishielectric:fx3gc_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3gc-32mt\/d_firmware — cpe:2.3:o:mitsubishielectric:fx3gc-32mt\/d_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3gc-32mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3gc-32mt\/dss_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3ge-24mr\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3ge-24mr\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3ge-24mr\/es_firmware — cpe:2.3:o:mitsubishielectric:fx3ge-24mr\/es_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3ge-24mt\/ds_firmware — cpe:2.3:o:mitsubishielectric:fx3ge-24mt\/ds_firmware:-:*:*:*:*:*:*:*
mitsubishielectric fx3ge-24mt\/dss_firmware — cpe:2.3:o:mitsubishielectric:fx3ge-24mt\/dss_firmware:-:*:*:*:*:*:*:*

References for CVE-2023-4562

cvelogic Threat Intelligence