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New Exim BDAT Vulnerability Exposes GnuTLS Builds to Potential Code Execution

·Source: The Hacker News

Updated:

Executive Summary

Exim has released security updates to address a severe security issue affecting certain configurations that could enable memory corruption and potential code execution. Exim is an open-source Mail Transfer Agent (MTA) designed for Unix-like systems to receive, route, and deliver email. The vulnerability, tracked as CVE-2026-45185, aka Dead.Letter, has been described as a use-after-free

Analysis

Exim has released security updates to address a severe security issue affecting certain configurations that could enable memory corruption and potential code execution. Exim is an open-source Mail Transfer Agent (MTA) designed for Unix-like systems to receive, route, and deliver email. The vulnerability, tracked as CVE-2026-45185, aka Dead.Letter, has been described as a use-after-free

Indicators of Compromise (1)

CVE (1)
CVE-2026-45185
NVDMITRE CVE
Source Attribution

Originally published by The Hacker News on May 12, 2026.

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