Answer in brief
CVE-2020-37121 records a Medium severity (CVSS 5.5) vulnerability in CODE::BLOCKS 16.01 - Buffer Overflow (SEH) UNICODE. The current sources do not mark it as known exploited. The current feed maps Code::Blocks/Code::Blocks (generic). 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 5.5. 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 Code::Blocks/Code::Blocks (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Code::Blocks/Code::Blocksgeneric | 16.01 | Not reported |
Published upstream
Feb 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 6, 2026
CODE::BLOCKS 16.01 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler with crafted Unicode characters. Attackers can create a malicious text file with 1982 bytes of buffer and shellcode to trigger remote code execution.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2020-37121 records a Medium severity (CVSS 5.5) vulnerability in CODE::BLOCKS 16.01 - Buffer Overflow (SEH) UNICODE. The current sources do not mark it as known exploited. The current feed maps Code::Blocks/Code::Blocks (generic). 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 5.5. 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 Code::Blocks/Code::Blocks (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Code::Blocks/Code::Blocksgeneric | 16.01 | Not reported |
Published upstream
Feb 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 6, 2026
CODE::BLOCKS 16.01 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler with crafted Unicode characters. Attackers can create a malicious text file with 1982 bytes of buffer and shellcode to trigger remote code execution.
Quoted source text, attributed separately from HOL analysis.