CVE-2021-26529

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 and 6.7-6.18 (compiled with mbedTLS 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/1203
https://github.com/cesanta/mongoose/issues/1203

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