CVE-2021-26530

9.1 criticalEPSS 1.5%

Critical (9.1) in cesanta mongoose. EPSS 1.5% chance of exploitation in the next 30 days.

The mg_tls_init function in Cesanta Mongoose HTTPS server 7.0 (compiled with OpenSSL support) is vulnerable to remote OOB write attack via connection request after exhausting memory pool.

Severity

CVSS 3.1

9.1 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

EPSS: 1.5% chance of exploitation in the next 30 days; higher than 74% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2021-02-08
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

cesanta:mongoose

References

https://github.com/cesanta/mongoose/issues/1204
https://github.com/cesanta/mongoose/issues/1204

Check your stack JSON