VulnerabilityModified
CVE-2019-12951
The parse_mqtt() function in mg_mqtt.c has a critical heap-based buffer overflow.
CRITICAL 9.8EPSS 1.95%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.95%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in Mongoose before 6.15. The parse_mqtt() function in mg_mqtt.c has a critical heap-based buffer overflow.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.95% probability · 80th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- cesanta/mongoose
- Source
- cve@mitre.org
EPSS 2.0% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/cesanta/mongoose/commit/b3e0f780c34cea88f057a62213c012aa88fe2debPatch, Third Party Advisory
- https://github.com/cesanta/mongoose/releases/tag/6.15Release Notes, Third Party Advisory
- https://github.com/cesanta/mongoose/commit/b3e0f780c34cea88f057a62213c012aa88fe2debPatch, Third Party Advisory
- https://github.com/cesanta/mongoose/releases/tag/6.15Release Notes, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.