How severe is CVE-2023-50707?

CVE-2023-50707 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2023-50707 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-2023-50707?

CVE-2023-50707 affects Efacec Bcu 500 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-50707?

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-2023-50707 published?

CVE-2023-50707 was published on 2023-12-20 and last updated on 2026-06-17.

CVE-2023-50707

CVE-2023-50707 is a critical-severity vulnerability in Efacec Bcu 500 Firmware with a CVSS 3.x base score of 9.6. 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-400.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Efacec Bcu 500 Firmware
Published: 2023-12-20
Last modified: 2026-06-17

Description

Through the exploitation of active user sessions, an attacker could send custom requests to cause a denial-of-service condition on the device.

Frequently asked questions

What is CVE-2023-50707?: Through the exploitation of active user sessions, an attacker could send custom requests to cause a denial-of-service condition on the device.
How severe is CVE-2023-50707?: CVE-2023-50707 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2023-50707 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-2023-50707?: CVE-2023-50707 affects Efacec Bcu 500 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-50707?: 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-2023-50707 published?: CVE-2023-50707 was published on 2023-12-20 and last updated on 2026-06-17.

References

https://www.cisa.gov/news-events/ics-advisories/icsa-23-353-02

Affected products (1)

cpe:2.3:o:efacec:bcu_500_firmware:4.07:*:*:*:*:*:*:*

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