Answer in brief
CVE-2020-5953 records a High severity (CVSS 7.5) vulnerability in CVE Program Container. The current sources do not mark it as known exploited. The current feed maps n/a/n/a (generic), Siemens/SIMATIC Field PG M5 (generic), Siemens/SIMATIC Field PG M6 (generic), Siemens/SIMATIC IPC127E (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps n/a/n/a (generic), Siemens/SIMATIC Field PG M5 (generic), Siemens/SIMATIC Field PG M6 (generic), Siemens/SIMATIC IPC127E (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:insyde:insydeh2o:5.12.09.0074:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:insyde:insydeh2o:5.23.04.0045:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:insyde:insydeh2o:5.23.45.0023:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:insyde:insydeh2o:5.33.15.0034:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:insyde:insydeh2o:5.34.03.0029:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:insyde:insydeh2o:5.42.03.0010:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:ruggedcom_ape1808:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_field_pg_m5:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_field_pg_m6:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_ipc127e:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_ipc227g:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_ipc277g:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_ipc327g:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_ipc377g:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_ipc427e:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_ipc477e:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_ipc477e_pro:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_ipc627e:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_ipc647e:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_ipc677e:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_ipc847e:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:siemens:simatic_itp1000:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_ipc127e_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_ipc227g_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_ipc277g_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_ipc327g_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_ipc377g_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_ipc427e_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_ipc477e_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_ipc477e_pro_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_ipc627e_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_ipc647e_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_ipc677e_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_ipc847e_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:siemens:simatic_itp1000_firmware:-:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| n/a/n/ageneric | n/a | Not reported |
| Siemens/SIMATIC Field PG M5generic | >=0 <V22.01.10 | V22.01.10 |
| Siemens/SIMATIC Field PG M6generic | >=0 <V26.01.13 | V26.01.13 |
| Siemens/SIMATIC IPC127Egeneric | >=0 <V27.01.09 | V27.01.09 |
| Siemens/SIMATIC IPC227Ggeneric | >=0 <V28.01.04 | V28.01.04 |
| Siemens/SIMATIC IPC277Ggeneric | >=0 <V28.01.04 | V28.01.04 |
| Siemens/SIMATIC IPC277G PROgeneric | >=0 <V28.01.04 | V28.01.04 |
| Siemens/SIMATIC IPC327Ggeneric | >=0 <V28.01.04 | V28.01.04 |
| Siemens/SIMATIC IPC377Ggeneric | >=0 <V28.01.04 | V28.01.04 |
| Siemens/SIMATIC IPC427Egeneric | >=0 <V21.01.17 | V21.01.17 |
| Siemens/SIMATIC IPC477Egeneric | >=0 <V21.01.17 | V21.01.17 |
| Siemens/SIMATIC IPC477E PROgeneric | >=0 <V21.01.17 | V21.01.17 |
| Siemens/SIMATIC IPC627Egeneric | >=0 <V25.02.12 | V25.02.12 |
| Siemens/SIMATIC IPC647Egeneric | >=0 <V25.02.12 | V25.02.12 |
| Siemens/SIMATIC IPC677Egeneric | >=0 <V25.02.12 | V25.02.12 |
| Siemens/SIMATIC IPC847Egeneric | >=0 <V25.02.12 | V25.02.12 |
| Siemens/SIMATIC ITP1000generic | >=0 <V23.01.10 | V23.01.10 |
| Siemens/SIPLUS IPC427Egeneric | >=0 <V21.01.17 | V21.01.17 |
Published upstream
Feb 3, 2022
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
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).
Quoted source text, attributed separately from HOL analysis.