CVE-2026-5244
HighCVSS 7.3Exploitation Probability (EPSS)
Elevated risk54th percentile - higher than 54% of all known CVEs
Summary
Wykryto podatność w Cesanta Mongoose do wersji 7.20, która dotyczy funkcji mg_tls_recv_cert w pliku mongoose.c komponentu TLS 1.3 Handler. Manipulacja argumentem pubkey prowadzi do przepełnienia bufora w stercie.
Risk Assessment
Atak może być przeprowadzony zdalnie, co stwarza poważne zagrożenie dla bezpieczeństwa systemu. Publiczne ujawnienie exploita zwiększa ryzyko wykorzystania tej podatności.
Recommendation
Zaleca się aktualizację do wersji 7.21, która łagodzi ten problem. Należy zastosować poprawkę o nazwie 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1.
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Original NVD description (English source)
A vulnerability has been found in Cesanta Mongoose up to 7.20. This affects the function mg_tls_recv_cert of the file mongoose.c of the component TLS 1.3 Handler. Such manipulation of the argument pubkey leads to heap-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 7.21 mitigates this issue. The name of the patch is 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

