CVE-2017-2891

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2017-11-07 · updated 2026-06-17
Weakness: CWE-416

Description

An exploitable use-after-free vulnerability exists in the HTTP server implementation of Cesanta Mongoose 6.8. An ordinary HTTP POST request with a CGI target can cause a reuse of previously freed pointer potentially resulting in remote code execution. An attacker needs to send this HTTP request over the network to trigger this vulnerability.

Affected products

Cesanta Mongoose: 6.8

References

https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0398
https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0398

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