Vulnerability Monitor

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CVE-2021-41839

An issue was discovered in NvmExpressDxe in the kernel 5.0 through 5.5 in Insyde InsydeH2O. Because of an Untrusted Pointer Dereference that causes SMM memory corruption, an attacker may be able to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.2, requiring local system access to exploit with relatively low complexity without requiring user interaction . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 1 product from insyde organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2022, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2022-02-03T02:15:07.123

Last Modified

2025-11-04T20:16:01.230

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.2 (HIGH)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:P/I:P/A:P

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

3.9

Impact Score

6.4

Weaknesses

Type: Primary
CWE-119

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	insyde	insydeh2o	< 5.16.25	Yes
Application	insyde	insydeh2o	< 5.26.25	Yes
Application	insyde	insydeh2o	< 5.35.25	Yes
Application	insyde	insydeh2o	< 5.43.25	Yes
Application	insyde	insydeh2o	< 5.51.25	Yes

References

https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf Third Party Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20220217-0016/ Third Party Advisory ([email protected])
https://www.insyde.com/security-pledge Vendor Advisory ([email protected])
https://www.insyde.com/security-pledge/SA-2022020 Vendor Advisory ([email protected])
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20220217-0016/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.insyde.com/security-pledge Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.insyde.com/security-pledge/SA-2022020 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.kb.cert.org/vuls/id/796611 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For insyde's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.