A vulnerability exists in System Management Interrupt (SWSMI) handler of InsydeH2O UEFI…
Priority LOW 33Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- High
- 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
A vulnerability exists in System Management Interrupt (SWSMI) handler of InsydeH2O UEFI Firmware code located in SWSMI handler that dereferences gRT (EFI_RUNTIME_SERVICES) pointer to call a GetVariable service, which is located outside of SMRAM. This can result in code execution in SMM (escalating privilege from ring 0 to ring -2).
Why it matters now
EPSS 0.00284 21st 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 · 38
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:insyde:insydeh2o:5.12.09.0074:*:*:*:*:*:*:* | 5.12.09.0074 | Vulnerable | Insyde Software |
| cpe:2.3:a:insyde:insydeh2o:5.23.04.0045:*:*:*:*:*:*:* | 5.23.04.0045 | Vulnerable | Insyde Software |
| cpe:2.3:a:insyde:insydeh2o:5.23.45.0023:*:*:*:*:*:*:* | 5.23.45.0023 | Vulnerable | Insyde Software |
| cpe:2.3:a:insyde:insydeh2o:5.33.15.0034:*:*:*:*:*:*:* | 5.33.15.0034 | Vulnerable | Insyde Software |
| cpe:2.3:a:insyde:insydeh2o:5.34.03.0029:*:*:*:*:*:*:* | 5.34.03.0029 | Vulnerable | Insyde Software |
| cpe:2.3:a:insyde:insydeh2o:5.42.03.0010:*:*:*:*:*:*:* | 5.42.03.0010 | Vulnerable | Insyde Software |
| cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:ruggedcom_ape1808:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_field_pg_m6:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
- cpe:2.3:a:insyde:insydeh2o:5.12.09.0074:*:*:*:*:*:*:* Versions 5.12.09.0074 Vulnerable ·Insyde Software
- cpe:2.3:a:insyde:insydeh2o:5.23.04.0045:*:*:*:*:*:*:* Versions 5.23.04.0045 Vulnerable ·Insyde Software
- cpe:2.3:a:insyde:insydeh2o:5.23.45.0023:*:*:*:*:*:*:* Versions 5.23.45.0023 Vulnerable ·Insyde Software
- cpe:2.3:a:insyde:insydeh2o:5.33.15.0034:*:*:*:*:*:*:* Versions 5.33.15.0034 Vulnerable ·Insyde Software
- cpe:2.3:a:insyde:insydeh2o:5.34.03.0029:*:*:*:*:*:*:* Versions 5.34.03.0029 Vulnerable ·Insyde Software
- cpe:2.3:a:insyde:insydeh2o:5.42.03.0010:*:*:*:*:*:*:* Versions 5.42.03.0010 Vulnerable ·Insyde Software
- cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:ruggedcom_ape1808:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_field_pg_m6:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
Show 28 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:siemens:simatic_ipc127e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_ipc127e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_ipc227g_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_ipc227g:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_ipc277g_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_ipc277g:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_itp1000_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_itp1000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_ipc477e_pro_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_ipc477e_pro:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_ipc627e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_ipc627e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_ipc647e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_ipc647e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_ipc677e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_ipc677e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_ipc847e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_ipc847e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_ipc327g_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_ipc327g:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_ipc377g_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_ipc377g:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_ipc427e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_ipc427e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_ipc477e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_ipc477e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_field_pg_m5:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
- cpe:2.3:o:siemens:simatic_ipc127e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_ipc127e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_ipc227g_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_ipc227g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_ipc277g_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_ipc277g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_itp1000_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_itp1000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_ipc477e_pro_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_ipc477e_pro:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_ipc627e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_ipc627e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_ipc647e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_ipc647e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_ipc677e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_ipc677e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_ipc847e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_ipc847e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_ipc327g_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_ipc327g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_ipc377g_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_ipc377g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_ipc427e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_ipc427e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_ipc477e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_ipc477e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_field_pg_m5:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-5953
- 2026-10-03 Alias added: GHSA-f8pw-77pg-8gv6
References
Sources
- CVE-2020-5953 · CVE Program
- CVE-2020-5953 · NVD
- FIRST EPSS
- GHSA-f8pw-77pg-8gv6 · 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