CVE-2023-27471

mediumpriority · track · 22EPSS 0.002 · 6 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.17% (6th) EPSS

CVSS 5.5 · medium

Is it mine?

12 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.15.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USLLM-inferred

affected products (12)

Products and version ranges known to be affected.

Dell BIOSall versionscert_bundDEcpe:/h:dell:bios:-
Dell Computerall versionscert_bundDEcpe:/o:dell:dell_computer:-
Insyde UEFI Firmwareall versionscert_bundDEcpe:/h:insyde:uefi:-
Lenovo BIOSall versionscert_bundDEcpe:/h:lenovo:bios:-
Lenovo Computerall versionscert_bundDEcpe:/h:lenovo:computer:-
n/a n/a≤ n/aenisa_euvdEU
insyde insydeh2o= 5.0nvdUScpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*
insyde insydeh2o= 5.1nvdUScpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*
insyde insydeh2o= 5.2nvdUScpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*
insyde insydeh2o= 5.3nvdUScpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*
insyde insydeh2o= 5.4nvdUScpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*
insyde insydeh2o= 5.5nvdUScpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-2021Insyde UEFI Firmware: Mehrere SchwachstellenDeutsch2023-08-08csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in Insyde UEFI Firmware ausnutzen, um Dateien zu manipulieren, einen Denial of Service zu verursachen oder Informationen offenzulegen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2023-08-18modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

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