Understanding and Defending Against CVE-2026-15340: A Critical Buffer Overflow Vulnerability in lwIP SMTP Client
CVE-2026-15340 is a critical buffer overflow vulnerability in the lwIP SMTP client, which has a CVSS score of 9.8. The vulnerability occurs because the lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow. This vulnerability affects lwIP SMTP client version 2.2.1 and can be exploited over the network with low attack complexity. Understanding and defending against this vulnerability is crucial for maintaining the security of affected systems.