What’s Vulnerable › Vulnerabilities

CVE-2021-43522

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-02-03 · updated 2026-08-11
• Weakness: CWE-787

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.

Affected products

• Insydeh2O: from 5.1 before 5.14.34; from 5.2 before 5.24.34; from 5.3 before 5.33.34 — fixed in 5.14.34, 5.24.34, 5.33.34

How to fix

Upgrade to a fixed version: Insydeh2O 5.14.34, 5.24.34, 5.33.34. Check the vendor advisory for mitigations.

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/
• https://www.insyde.com/security-pledge
• https://www.kb.cert.org/vuls/id/796611
• https://cert-portal.siemens.com/productcert/html/ssa-306654.html

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