An issue was discovered in UsbCoreDxe in Insyde InsydeH2O with kernel 5.5 before…
Priority LOW 36Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
An issue was discovered in UsbCoreDxe in Insyde InsydeH2O with kernel 5.5 before 05.51.45, 5.4 before 05.43.45, 5.3 before 05.35.45, 5.2 before 05.26.45, 5.1 before 05.16.45, and 5.0 before 05.08.45. An SMM callout vulnerability allows an attacker to hijack execution flow of code running in System Management Mode. Exploiting this issue could lead to escalating privileges to SMM.
Why it matters now
EPSS 0.00351 28th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:* | 5.1 to before 5.16.45; 5.2 to before 5.26.45; 5.3 to before 5.33.45; 5.0 to before 5.08.45; 5.4 to before 5.43.45; 5.5 to before 5.51.45 | Vulnerable | Insyde Software |
- cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:* Versions 5.1 to before 5.16.45; 5.2 to before 5.26.45; 5.3 to before 5.33.45; 5.0 to before 5.08.45; 5.4 to before 5.43.45; 5.5 to before 5.51.45 Vulnerable ·Insyde Software
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-43323
- 2026-10-03 Alias added: GHSA-v6h3-3hh9-32cf
References
More Insyde Software Insydeh2o vulnerabilities
- TI-2023-08797 An issue was discovered in ChipsetSvcSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. CVSS 3.1HIGH 8.8
- TI-2022-16772 An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. CVSS 3.1HIGH 8.2
- TI-2022-16681 An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. CVSS 3.1HIGH 8.2
- TI-2022-16323 An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. CVSS 3.1HIGH 8.2
- TI-2022-15984 An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. CVSS 3.1HIGH 8.2
- TI-2023-08799 An issue was discovered in Insyde InsydeH2O with kernel 5.2 through 5.5. CVSS 3.1HIGH 7.8
Sources
- CVE-2021-43323 · CVE Program
- CVE-2021-43323 · NVD
- FIRST EPSS
- GHSA-v6h3-3hh9-32cf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences