CVE-2021-26528

CRITICAL 9.1CVE-2021-26528 · Published 08/02/2021 · updated 17/06/2026

In short

CVE-2021-26528 is a CRITICAL (CVSS 9.1) vulnerability affecting mongoose (cesanta).
Chance of exploitation in the next 30 days (EPSS): 1.5%, higher than 74.1% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
mongoose cesanta	`= 7.0`	No fix yet

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.

References

cesanta/mongoose · Exploit

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Package

Affected versions

Patched versions

mongoose

cesanta

= 7.0

No fix yet

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