How severe is CVE-2023-4856?

CVE-2023-4856 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-4856 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.

How do I fix CVE-2023-4856?

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.

Does CVE-2023-4856 have an EU (EUVD) identifier?

Yes. CVE-2023-4856 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-54696.

When was CVE-2023-4856 published?

CVE-2023-4856 was published on 2024-04-15 and last updated on 2026-06-17.

CVE-2023-4856

CVE-2023-4856 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. 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-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-54696
Weakness: CWE-78
Published: 2024-04-15
Last modified: 2026-06-17

Description

A format string vulnerability was identified in SMM/SMM2 and FPC that could allow an authenticated user to execute arbitrary commands on a specific API endpoint.

Frequently asked questions

What is CVE-2023-4856?: A format string vulnerability was identified in SMM/SMM2 and FPC that could allow an authenticated user to execute arbitrary commands on a specific API endpoint.
How severe is CVE-2023-4856?: CVE-2023-4856 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-4856 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.
How do I fix CVE-2023-4856?: 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.
Does CVE-2023-4856 have an EU (EUVD) identifier?: Yes. CVE-2023-4856 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-54696.
When was CVE-2023-4856 published?: CVE-2023-4856 was published on 2024-04-15 and last updated on 2026-06-17.

References

https://support.lenovo.com/us/en/product_security/LEN-140420

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