How severe is CVE-2023-6711?

CVE-2023-6711 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-6711 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-6711?

CVE-2023-6711 primarily affects Hitachienergy Rtu500 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-6711?

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

When was CVE-2023-6711 published?

CVE-2023-6711 was published on 2023-12-19 and last updated on 2026-06-17.

CVE-2023-6711

CVE-2023-6711 is a medium-severity vulnerability in Hitachienergy Rtu500 Firmware with a CVSS 3.x base score of 5.9. 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-120.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Hitachienergy Rtu500 Firmware
Published: 2023-12-19
Last modified: 2026-06-17

Description

Vulnerability exists in SCI IEC 60870-5-104 and HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below. Specially crafted messages sent to the mentioned components are not validated properly and can result in buffer overflow and as final consequence to a reboot of an RTU500 CMU.

Frequently asked questions

What is CVE-2023-6711?: Vulnerability exists in SCI IEC 60870-5-104 and HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below. Specially crafted messages sent to the mentioned components are not validated properly and can result in buffer overflow and as final consequence to a reboot of an RTU500 CMU.
How severe is CVE-2023-6711?: CVE-2023-6711 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-6711 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-6711?: CVE-2023-6711 primarily affects Hitachienergy Rtu500 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-6711?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-6711 published?: CVE-2023-6711 was published on 2023-12-19 and last updated on 2026-06-17.

References

https://publisher.hitachienergy.com/preview?DocumentId=8DBD000184&languageCode=en&Preview=true

Affected products (2)

cpe:2.3:o:hitachienergy:rtu500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu500_firmware:13.5.1.0:*:*:*:*:*:*:*

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