How severe is CVE-2023-4562?

CVE-2023-4562 has a CVSS 3.x base score of 9.1, 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 none.

Is CVE-2023-4562 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-4562?

CVE-2023-4562 primarily affects Mitsubishielectric Fx3g-14 Mr/ds Firmware. In total, 190 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-4562?

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.

When was CVE-2023-4562 published?

CVE-2023-4562 was published on 2023-10-13 and last updated on 2026-06-17.

CVE-2023-4562

CVE-2023-4562 is a critical-severity vulnerability in Mitsubishielectric Fx3g-14 Mr/ds Firmware with a CVSS 3.x base score of 9.1. 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Mitsubishielectric Fx3g-14 Mr/ds Firmware
Published: 2023-10-13
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2023-4562?: 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.
How severe is CVE-2023-4562?: CVE-2023-4562 has a CVSS 3.x base score of 9.1, 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 none.
Is CVE-2023-4562 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-4562?: CVE-2023-4562 primarily affects Mitsubishielectric Fx3g-14 Mr/ds Firmware. In total, 190 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-4562?: 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.
When was CVE-2023-4562 published?: CVE-2023-4562 was published on 2023-10-13 and last updated on 2026-06-17.

References

Affected products (190)

cpe:2.3:o:mitsubishielectric:fx3g-14_mr\/ds_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14_mr\/es_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14_mt\/ds_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14_mt\/dss_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14_mt\/es_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14_mt\/ess_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14mr\/ds_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14mr\/es_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14mr\/es-a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14mt\/ds_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14mt\/dss_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14mt\/es_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14mt\/es-a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-14mt\/ess_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-232adp\(-mb\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24_mr\/ds_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24_mr\/es_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24_mt\/ds_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24_mt\/dss_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24_mt\/es_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24_mt\/ess_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24mr\/ds_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24mr\/es_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24mr\/es-a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24mt\/ds_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24mt\/dss_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24mt\/es_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24mt\/es-a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-24mt\/ess_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-32_mt\/dss_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-3a-adp_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-40_mr\/ds_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-40_mr\/es_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-40_mt\/ds_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-40_mt\/dss_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-40_mt\/es_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-40_mt\/ess_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-40mr\/ds_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-40mr\/es_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:fx3g-40mr\/es-a_firmware:-:*:*:*:*:*:*:*

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