How severe is CVE-2022-40265?

CVE-2022-40265 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-40265 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-40265?

CVE-2022-40265 primarily affects Mitsubishielectric Rj71en71 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-40265?

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

When was CVE-2022-40265 published?

CVE-2022-40265 was published on 2022-11-30 and last updated on 2026-06-17.

CVE-2022-40265

CVE-2022-40265 is a high-severity vulnerability in Mitsubishielectric Rj71en71 Firmware with a CVSS 3.x base score of 8.6. 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-20.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Mitsubishielectric Rj71en71 Firmware
Published: 2022-11-30
Last modified: 2026-06-17

Description

Improper Input Validation vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R Series RJ71EN71 Firmware version "65" and prior and Mitsubishi Electric Corporation MELSEC iQ-R Series R04/08/16/32/120ENCPU Network Part Firmware version "65" and prior allows a remote unauthenticated attacker to cause a Denial of Service condition by sending specially crafted packets. A system reset is required for recovery.

Frequently asked questions

What is CVE-2022-40265?: Improper Input Validation vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R Series RJ71EN71 Firmware version "65" and prior and Mitsubishi Electric Corporation MELSEC iQ-R Series R04/08/16/32/120ENCPU Network Part Firmware version "65" and prior allows a remote unauthenticated attacker to cause a Denial of Service condition by sending specially crafted packets. A system reset is required for recovery.
How severe is CVE-2022-40265?: CVE-2022-40265 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-40265 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-40265?: CVE-2022-40265 primarily affects Mitsubishielectric Rj71en71 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-40265?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-40265 published?: CVE-2022-40265 was published on 2022-11-30 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:o:mitsubishielectric:rj71en71_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:r04encpu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:r08encpu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:r16encpu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:r32encpu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:r120encpu_firmware:*:*:*:*:*:*:*:*

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