How severe is CVE-2023-27471?

CVE-2023-27471 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-27471 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.

What products are affected by CVE-2023-27471?

CVE-2023-27471 primarily affects Insyde Insydeh2o. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-27471?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-27471 published?

CVE-2023-27471 was published on 2023-08-18 and last updated on 2026-06-17.

CVE-2023-27471

CVE-2023-27471 is a medium-severity vulnerability in Insyde Insydeh2o with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Insyde Insydeh2o
Published: 2023-08-18
Last modified: 2026-06-17

Description

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. UEFI implementations do not correctly protect and validate information contained in the 'MeSetup' UEFI variable. On some systems, this variable can be overwritten using operating system APIs. Exploitation of this vulnerability could potentially lead to denial of service for the platform.

Frequently asked questions

What is CVE-2023-27471?: An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. UEFI implementations do not correctly protect and validate information contained in the 'MeSetup' UEFI variable. On some systems, this variable can be overwritten using operating system APIs. Exploitation of this vulnerability could potentially lead to denial of service for the platform.
How severe is CVE-2023-27471?: CVE-2023-27471 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-27471 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.
What products are affected by CVE-2023-27471?: CVE-2023-27471 primarily affects Insyde Insydeh2o. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-27471?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-27471 published?: CVE-2023-27471 was published on 2023-08-18 and last updated on 2026-06-17.

References

https://www.insyde.com/security-pledge/SA-2023036

Affected products (6)

cpe:2.3:a:insyde:insydeh2o:5.0:*:*:*:*:*:*:*
cpe:2.3:a:insyde:insydeh2o:5.1:*:*:*:*:*:*:*
cpe:2.3:a:insyde:insydeh2o:5.2:*:*:*:*:*:*:*
cpe:2.3:a:insyde:insydeh2o:5.3:*:*:*:*:*:*:*
cpe:2.3:a:insyde:insydeh2o:5.4:*:*:*:*:*:*:*
cpe:2.3:a:insyde:insydeh2o:5.5:*:*:*:*:*:*:*

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