In versions prior to 1.1 of the Eclipse Paho MQTT C Client, the client does not check rem_len size in readpacket.
Priority MEDIUM 44CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
In versions prior to 1.1 of the Eclipse Paho MQTT C Client, the client does not check rem_len size in readpacket.
Why it matters now
EPSS 0.01214 68th percentileScored 2026-11-07
Fix Fixed Eclipse Paho MQTT C Client (The Eclipse Foundation): 1.1.0
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 |
|---|---|---|---|---|---|
| Eclipse Foundation | Eclipse Paho MQTT C Client | before 1.1.0 | 1.1.0 | Patch available | CNA |
- Eclipse Paho MQTT C Client VendorEclipse Foundation Affected before 1.1.0 Fixed in 1.1.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:eclipse:paho_mqtt_c\/c\+\+_client:*:*:*:*:*:*:*:* | before 1.1.0 | Vulnerable | Eclipse Foundation |
- cpe:2.3:a:eclipse:paho_mqtt_c\/c\+\+_client:*:*:*:*:*:*:*:* Versions before 1.1.0 Vulnerable ·Eclipse Foundation
Remediation
- Fix · CNA Eclipse Paho MQTT C Client (The Eclipse Foundation) Fixed in 1.1.0
Timeline
- 2026-10-02 Threatist record created from CVE-2021-41036
- 2026-10-03 Alias added: GHSA-m9hg-v7xv-429h
References
Sources
- CVE-2021-41036 · CVE Program
- CVE-2021-41036 · NVD
- FIRST EPSS
- GHSA-m9hg-v7xv-429h · 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