CVE-2021-43522

7.5 highEPSS 0.3%

High (7.5) in insyde insydeh2o. EPSS 0.3% chance of exploitation in the next 30 days.

An issue was discovered in Insyde InsydeH2O with kernel 5.1 through 2021-11-08, 5.2 through 2021-11-08, and 5.3 through 2021-11-08. A StorageSecurityCommandDxe SMM memory corruption vulnerability allows an attacker to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 18% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2022-02-03
Modified: 2026-08-11
Record from: the NVD, synced 2026-10-19

Affected

insyde:insydeh2o

References

https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
https://security.netapp.com/advisory/ntap-20220216-0003/
https://www.insyde.com/security-pledge
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
https://security.netapp.com/advisory/ntap-20220216-0003/

Check your stack JSON