Critical Exim Vulnerability CVE-2026-45185: Immediate Action Required
In May 2026, a critical vulnerability identified as CVE-2026-45185 was discovered in Exim, a widely used open-source mail transfer agent. This use-after-free flaw in certain GnuTLS configurations allows unauthenticated remote attackers to execute arbitrary code by exploiting the BDAT body parsing path during TLS shutdown. The vulnerability affects Exim versions 4.97 through 4.99.2 when built with GnuTLS and with STARTTLS and CHUNKING enabled. Exploitation could lead to unauthorized access to email data and potential further compromise of affected systems. ([thehackerwire.com](https://www.thehackerwire.com/vulnerability/CVE-2026-45185/?utm_source=openai)) The discovery of this vulnerability underscores the ongoing risks associated with widely deployed open-source software and the importance of timely patching. The incident also highlights the evolving landscape of cyber threats, where attackers increasingly target foundational internet services to gain broad access.
Kill Chain