An issue was discovered in Int15MicrocodeSmm in Insyde InsydeH2O before 2021-10-14 on…
Priority MEDIUM 45Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- 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 Int15MicrocodeSmm in Insyde InsydeH2O before 2021-10-14 on Intel client chipsets. A caller may be able to escalate privileges.
Why it matters now
EPSS 0.01413 72nd 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 · 45
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.32.30.0001 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:ice_lake:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.41.35.0001 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:tiger_lake:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.42.11.0026 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:whitley-sp:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.04.21.0068 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:grantley-ep:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.42.09.0003 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:elkhart_lake:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.32.30.0001 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:ice_lake:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.41.35.0001 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:tiger_lake:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.42.11.0026 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:whitley-sp:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.04.21.0068 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:grantley-ep:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.42.09.0003 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:elkhart_lake:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
Show 35 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.21.51.0040 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:purley-ep_refresh_neon_city:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.34.09.0030 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:comet_lake_rvp:-:*:*:*:embedded:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:h:intel:comet_lake_rvp:-:*:*:*:server:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.32.47.0001 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:comet_lake:-:*:*:*:client:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.23.45.0023 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:whiskey_lake_rvp:-:*:*:*:embedded:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:h:intel:whiskey_lake_rvp:-:*:*:*:server:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.21.43.0001 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:whiskey_lake:-:*:*:*:client:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.23.04.0045 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:mehlow:-:*:*:*:embedded:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:h:intel:mehlow-r:-:*:*:*:embedded:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:h:intel:mehlow-r:-:*:*:*:server:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:h:intel:mehlow:-:*:*:*:server:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:h:intel:coffee_lake:-:*:*:*:client:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:h:intel:cannon_lake:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.11.26.0015 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:kaby_lake_mrd:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.12.09.0075 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:greenlow:-:*:*:*:embedded:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:h:intel:greenlow-r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:h:intel:greenlow:-:*:*:*:server:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:h:intel:greenlow-r:-:*:*:*:embedded:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.10.48.0001 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:kaby_lake:-:*:*:*:client:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.05.39.0001 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:skylake_mrd:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.04.15.0001 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:skylake:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* | before 05.23.27.0001 | Vulnerable | Insyde Software |
| cpe:2.3:h:intel:coffee_lake:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:h:intel:whiskey_lake:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.21.51.0040 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:purley-ep_refresh_neon_city:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.34.09.0030 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:comet_lake_rvp:-:*:*:*:embedded:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:h:intel:comet_lake_rvp:-:*:*:*:server:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.32.47.0001 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:comet_lake:-:*:*:*:client:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.23.45.0023 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:whiskey_lake_rvp:-:*:*:*:embedded:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:h:intel:whiskey_lake_rvp:-:*:*:*:server:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.21.43.0001 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:whiskey_lake:-:*:*:*:client:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.23.04.0045 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:mehlow:-:*:*:*:embedded:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:h:intel:mehlow-r:-:*:*:*:embedded:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:h:intel:mehlow-r:-:*:*:*:server:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:h:intel:mehlow:-:*:*:*:server:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:h:intel:coffee_lake:-:*:*:*:client:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:h:intel:cannon_lake:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.11.26.0015 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:kaby_lake_mrd:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.12.09.0075 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:greenlow:-:*:*:*:embedded:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:h:intel:greenlow-r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:h:intel:greenlow:-:*:*:*:server:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:h:intel:greenlow-r:-:*:*:*:embedded:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.10.48.0001 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:kaby_lake:-:*:*:*:client:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.05.39.0001 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:skylake_mrd:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.04.15.0001 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:skylake:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* Versions before 05.23.27.0001 Vulnerable ·Insyde Software
- cpe:2.3:h:intel:coffee_lake:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:h:intel:whiskey_lake:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-5955
- 2026-10-03 Alias added: GHSA-mf5j-wgq9-9jj2
References
Sources
- CVE-2020-5955 · CVE Program
- CVE-2020-5955 · NVD
- FIRST EPSS
- GHSA-mf5j-wgq9-9jj2 · 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