What’s Vulnerable › Vulnerabilities

CVE-2021-26528

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-08 · updated 2026-06-17
• Weakness: CWE-787

Description

The mg_http_serve_file function in Cesanta Mongoose HTTP server 7.0 is vulnerable to remote OOB write attack via connection request after exhausting memory pool.

Affected products

• Cesanta Mongoose: 7.0

References

• https://github.com/cesanta/mongoose/issues/1201
• https://github.com/cesanta/mongoose/issues/1201

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