How severe is CVE-2023-39373?

CVE-2023-39373 has a CVSS 3.x base score of 7.4, rated high 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-2023-39373 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-39373?

CVE-2023-39373 affects Hyundai Hyundai 2017 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-39373?

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-2023-39373 published?

CVE-2023-39373 was published on 2023-09-03 and last updated on 2026-06-17.

CVE-2023-39373

CVE-2023-39373 is a high-severity vulnerability in Hyundai Hyundai 2017 Firmware with a CVSS 3.x base score of 7.4. 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-294.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-294
Affected product: Hyundai Hyundai 2017 Firmware
Published: 2023-09-03
Last modified: 2026-06-17

Description

A Hyundai model (2017) - CWE-294: Authentication Bypass by Capture-replay.

Frequently asked questions

What is CVE-2023-39373?: A Hyundai model (2017) - CWE-294: Authentication Bypass by Capture-replay.
How severe is CVE-2023-39373?: CVE-2023-39373 has a CVSS 3.x base score of 7.4, rated high 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-2023-39373 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-39373?: CVE-2023-39373 affects Hyundai Hyundai 2017 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-39373?: 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-2023-39373 published?: CVE-2023-39373 was published on 2023-09-03 and last updated on 2026-06-17.

References

https://www.gov.il/en/Departments/faq/cve_advisories

Affected products (1)

cpe:2.3:o:hyundai:hyundai_2017_firmware:-:*:*:*:*:*:*:*

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