{"cve":"CVE-2021-43522","nvd":{"published":"2022-02-03T00:15:07.677","modified":"2026-08-11T13:17:22.203","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","score":7.5},"cwes":["CWE-787"],"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/"],"products":["insyde:insydeh2o"],"source":"nvd","synced_at":"2026-10-19T21:27:20.926095847+00:00"},"epss":{"cve":"CVE-2021-43522","score":0.00264,"percentile":0.18365,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}