How severe is CVE-2023-34399?

CVE-2023-34399 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-34399 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-34399?

CVE-2023-34399 affects Mercedes-benz Headunit Ntg6 Mercedes-benz User Experience. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-34399?

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.

Does CVE-2023-34399 have an EU (EUVD) identifier?

Yes. CVE-2023-34399 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-38477.

When was CVE-2023-34399 published?

CVE-2023-34399 was published on 2025-02-13 and last updated on 2026-06-17.

CVE-2023-34399

CVE-2023-34399 is a critical-severity vulnerability in Mercedes-benz Headunit Ntg6 Mercedes-benz User Experience with a CVSS 3.x base score of 9.8. 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-190.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-38477
Weakness: CWE-190
Affected product: Mercedes-benz Headunit Ntg6 Mercedes-benz User Experience
Published: 2025-02-13
Last modified: 2026-06-17

Description

Mercedes-Benz head-unit NTG6 contains functions to import or export profile settings over USB. Some values of this table are serialized archive according boost library. The version of boost library contains vulnerability integer overflow.

Frequently asked questions

What is CVE-2023-34399?: Mercedes-Benz head-unit NTG6 contains functions to import or export profile settings over USB. Some values of this table are serialized archive according boost library. The version of boost library contains vulnerability integer overflow.
How severe is CVE-2023-34399?: CVE-2023-34399 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-34399 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-34399?: CVE-2023-34399 affects Mercedes-benz Headunit Ntg6 Mercedes-benz User Experience. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-34399?: 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.
Does CVE-2023-34399 have an EU (EUVD) identifier?: Yes. CVE-2023-34399 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-38477.
When was CVE-2023-34399 published?: CVE-2023-34399 was published on 2025-02-13 and last updated on 2026-06-17.

References

https://securelist.com/mercedes-benz-head-unit-security-research/115218/

Affected products (1)

cpe:2.3:a:mercedes-benz:headunit_ntg6_mercedes-benz_user_experience:*:*:*:*:*:*:*:*

More vulnerabilities in Mercedes-benz Headunit Ntg6 Mercedes-benz User Experience

CVE-2023-34402 — High (CVSS 7.7): Mercedes-Benz head-unit NTG6 contains functions to import or export profile settings over USB. Inside file is…
CVE-2023-34400 — High (CVSS 7.5): Mercedes-Benz head-unit NTG6 contains functions to import or export profile settings over USB. In case of parsing file,…
CVE-2023-34398 — High (CVSS 7.5): Mercedes-Benz head-unit NTG6 contains functions to import or export profile settings over USB. Some values of this…
CVE-2023-34397 — High (CVSS 7.5): Mercedes Benz head-unit NTG 6 contains functions to import or export profile settings over USB. During parsing you can…
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CVE-2023-34404 — Medium (CVSS 4.9): Mercedes-Benz head-unit NTG6 has Ethernet pins on Base Board to connect module CSB. Attacker can connect to these pins…

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