Answer in brief
CVE-2021-34432 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 The Eclipse Foundation/Eclipse Mosquitto (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 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 The Eclipse Foundation/Eclipse Mosquitto (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| The Eclipse Foundation/Eclipse Mosquittogeneric | unspecified | Not reported |
Published upstream
Jul 27, 2021
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 2, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 2, 2026
In Eclipse Mosquitto versions 2.0.7 and earlier, the server will crash if the client tries to send a PUBLISH packet with topic length = 0.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2021-34432 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 The Eclipse Foundation/Eclipse Mosquitto (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 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 The Eclipse Foundation/Eclipse Mosquitto (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| The Eclipse Foundation/Eclipse Mosquittogeneric | unspecified | Not reported |
Published upstream
Jul 27, 2021
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 2, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 2, 2026
In Eclipse Mosquitto versions 2.0.7 and earlier, the server will crash if the client tries to send a PUBLISH packet with topic length = 0.
Quoted source text, attributed separately from HOL analysis.