Savannah - Lwip Smtp Client - CRITICAL - CVE-2026-15340. The lwIP SMTP client exhibits a vulnerability where it fails to adequately validate input sizes, potentially leading to a buffer overflow situation. This flaw could allow an attacker to exploit the buffer overflow, which may result in unauthorized access or execution of arbitrary code. Organizations using affected versions of lwIP should implement mitigation strategies to protect their systems from possible exploitation of this vulnerability.