What’s Vulnerable › Vulnerabilities

CVE-2017-2921

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-11-07 · updated 2026-06-17
• Weakness: CWE-190

Description

An exploitable memory corruption vulnerability exists in the Websocket protocol implementation of Cesanta Mongoose 6.8. A specially crafted websocket packet can cause an integer overflow, leading to a heap buffer overflow and resulting in denial of service and potential remote code execution. An attacker needs to send a specially crafted websocket packet over network to trigger this vulnerability.

Affected products

• Cesanta Mongoose: 6.8

References

• https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0428
• https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0428

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