How severe is CVE-2023-31345?

CVE-2023-31345 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-31345 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-31345?

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-2023-31345 have an EU (EUVD) identifier?

Yes. CVE-2023-31345 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-35656.

When was CVE-2023-31345 published?

CVE-2023-31345 was published on 2025-02-12 and last updated on 2026-06-17.

CVE-2023-31345

CVE-2023-31345 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. 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-1274.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-35656
Weakness: CWE-1274
Published: 2025-02-12
Last modified: 2026-06-17

Description

Improper input validation in the SMM handler may allow a privileged attacker to overwrite SMRAM, potentially leading to arbitrary code execution.

Frequently asked questions

What is CVE-2023-31345?: Improper input validation in the SMM handler may allow a privileged attacker to overwrite SMRAM, potentially leading to arbitrary code execution.
How severe is CVE-2023-31345?: CVE-2023-31345 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-31345 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-31345?: 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-2023-31345 have an EU (EUVD) identifier?: Yes. CVE-2023-31345 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-35656.
When was CVE-2023-31345 published?: CVE-2023-31345 was published on 2025-02-12 and last updated on 2026-06-17.

References

Other CWE-1274 vulnerabilities

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CVE-2025-29950 — High (CVSS 7.1): Improper input validation in system management mode (SMM) could allow a privileged attacker to overwrite stack memory…
CVE-2025-59694 — Medium (CVSS 6.8): The Chassis Management Board in Entrust nShield Connect XC, nShield 5c, and nShield HSMi through 13.6.11, or 13.7,…
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