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Critical Exim Vulnerabilities in Debian Lead to Remote Code Execution Risks

Critical Exim Vulnerabilities in Debian Lead to Remote Code Execution Risks

First seen 12 May 2026, 23:57 UTC • •
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ThreatCluster AI
ThreatCluster •May 13, 2026 at 23:29 UTC
  • •Critical vulnerabilities in Exim may lead to remote code execution.
  • •Debian has released patches for affected distributions including bookworm and trixie.
  • •Users are urged to upgrade their exim4 packages immediately to mitigate risks.

Debian has issued security advisories for the Exim mail transport agent, addressing critical vulnerabilities that may allow remote code execution. For the oldstable distribution (bookworm), the issue is resolved in version 4.96-15+deb12u9, while the stable distribution (trixie) has been patched in version 4.98.2-1+deb13u2. Additionally, Debian 11 (bullseye) has fixed the vulnerability in version 4.94.2-7+deb11u5. Users are strongly advised to upgrade their exim4 packages to mitigate these risks. The vulnerabilities could potentially allow attackers to execute arbitrary code remotely, posing significant risks to affected systems. The advisories highlight the importance of timely updates to maintain security integrity.

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Timeline

2026-05-12
Debian releases security advisories for Exim
Debian announced critical vulnerabilities in Exim affecting multiple distributions, urging users to upgrade their packages.
Linuxsecurity
2026-05-12
Patch released for Debian 11 (bullseye)
The vulnerability in Exim for Debian 11 has been fixed in version 4.94.2-7+deb11u5, with a recommendation to upgrade.
Linuxsecurity

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