How severe is CVE-2023-4518?

CVE-2023-4518 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-4518 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-4518?

CVE-2023-4518 primarily affects Hitachienergy Relion 670 Firmware. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-4518?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-4518 published?

CVE-2023-4518 was published on 2023-12-01 and last updated on 2026-06-17.

CVE-2023-4518

CVE-2023-4518 is a medium-severity vulnerability in Hitachienergy Relion 670 Firmware with a CVSS 3.x base score of 6.5. 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-1284.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1284
Affected product: Hitachienergy Relion 670 Firmware
Published: 2023-12-01
Last modified: 2026-06-17

Description

A vulnerability exists in the input validation of the GOOSE messages where out of range values received and processed by the IED caused a reboot of the device. In order for an attacker to exploit the vulnerability, goose receiving blocks need to be configured.

Frequently asked questions

What is CVE-2023-4518?: A vulnerability exists in the input validation of the GOOSE messages where out of range values received and processed by the IED caused a reboot of the device. In order for an attacker to exploit the vulnerability, goose receiving blocks need to be configured.
How severe is CVE-2023-4518?: CVE-2023-4518 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-4518 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-4518?: CVE-2023-4518 primarily affects Hitachienergy Relion 670 Firmware. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-4518?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-4518 published?: CVE-2023-4518 was published on 2023-12-01 and last updated on 2026-06-17.

References

https://publisher.hitachienergy.com/preview?DocumentId=8DBD000170&languageCode=en&Preview=true

Affected products (7)

cpe:2.3:o:hitachienergy:relion_670_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:relion_650_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:relion_650_firmware:2.2.1:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:relion_650_firmware:2.2.1.6:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:relion_sam600-io_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:relion_sam600-io_firmware:2.2.1:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:relion_sam600-io_firmware:2.2.1.6:*:*:*:*:*:*:*

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