Exim Mail vulnerability CVE-2026-45185: Find impacted assets

Critical remote code execution vulnerability in Exim (CVE-2026-45185, Dead.Letter) affects Exim versions prior to 4.99.3 when configured with GnuTLS: a use-after-free in BDAT body parsing can be triggered by a TLS close_notify mid-body during SMTP CHUNKING, causing heap corruption and enabling unauthenticated remote code execution (CVSS 9.8). The advisory recommends upgrading to Exim 4.99.3 or later, provides detection queries for asset discovery, and references earlier Exim vulnerabilities disclosed in 2023.