CVE-2023-27373

mediumpriority · track · 22EPSS 0.002 · 7 %ileDEEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.17% (7th) EPSS
CVSS 5.5 · medium
Is it mine?
73 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · cisa_csaf_ot · siemens_psirt

EPSS · scored 2026-10-27

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Due to insufficient input validation, an attacker can tamper with a runtime-accessible EFI variable to cause a dynamic BAR setting to overlap SMRAM.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

02

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:H/A:Nprimary · NVD / NIST USexploitability 1.8 · impact 3.6
v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:Csecondary · CISA US
v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondary · ENISA EU
v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondaryexploitability 1.8 · impact 3.6
v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v3.15.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)
03

ssvc

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

Trackcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-20USCWE-20US
05

affected products (73)

Products and version ranges known to be affected.

showing 20 of 73
06

advisories (2)

Vendor and ecosystem advisories describing this.

  • SSA-957369SSA-957369: Insyde BIOS Vulnerabilities in RUGGEDCOM APE1808 Product Family2023-09-12csaf · siemens_psirtDE

    Insyde has published information on vulnerabilities in Insyde BIOS up to August 2023. These vulnerabilities also affect the RUGGEDCOM APE1808 product family. Siemens has released updates for the affected products and recommends to update to the latest versions.

  • ICSA-23-257-04Siemens RUGGEDCOM APE1808 Products2023-09-12icsa · cisa_csaf_otUS

    Insyde has published information on vulnerabilities in Insyde BIOS up to August 2023. These vulnerabilities also affect the RUGGEDCOM APE1808 product family. Siemens has released updates for the affected products and recommends to update to the latest versions.

07

also known as (3)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcisa_csaf_otsiemens_psirtNVDCVE.orgMITRE
published 2023-08-07modified 2026-06-17
10

references (5)

External citations — patches, advisories, analysis.

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