What’s Vulnerable › Vulnerabilities

CVE-2019-12951

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-06-24 · updated 2026-06-17
• Weakness: CWE-787

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.

Affected products

• Cesanta Mongoose: before 6.15 — fixed in 6.15

How to fix

Upgrade to a fixed version: Cesanta Mongoose 6.15. Check the vendor advisory for mitigations.

References

• https://github.com/cesanta/mongoose/commit/b3e0f780c34cea88f057a62213c012aa88fe2deb
• https://github.com/cesanta/mongoose/releases/tag/6.15
• https://github.com/cesanta/mongoose/commit/b3e0f780c34cea88f057a62213c012aa88fe2deb
• https://github.com/cesanta/mongoose/releases/tag/6.15

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