Answer in brief
CVE-2021-41839 records a Unknown severity 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/RUGGEDCOM APE1808 - BIOS (generic), Siemens/SIMATIC Field PG M5 (generic), Siemens/SIMATIC Field PG M6 (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.
A CVSS score is not reported in the current record. 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/RUGGEDCOM APE1808 - BIOS (generic), Siemens/SIMATIC Field PG M5 (generic), Siemens/SIMATIC Field PG M6 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| n/a/n/ageneric | n/a | Not reported |
| Siemens/RUGGEDCOM APE1808 - BIOSgeneric | >=0 <V1.0.202N | V1.0.202N |
| 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
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2021-41839 records a Unknown severity 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/RUGGEDCOM APE1808 - BIOS (generic), Siemens/SIMATIC Field PG M5 (generic), Siemens/SIMATIC Field PG M6 (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.
A CVSS score is not reported in the current record. 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/RUGGEDCOM APE1808 - BIOS (generic), Siemens/SIMATIC Field PG M5 (generic), Siemens/SIMATIC Field PG M6 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| n/a/n/ageneric | n/a | Not reported |
| Siemens/RUGGEDCOM APE1808 - BIOSgeneric | >=0 <V1.0.202N | V1.0.202N |
| 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
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.
Quoted source text, attributed separately from HOL analysis.