PT-2026-36195

Name of the Vulnerable Software and Affected Versions Exim versions prior to 4.99.2 Description An issue exists on systems using musl libc excluding glibc where an attacker can cause a connection instance to crash. This occurs when the software processes malformed DNS data within PTR records,...

CVE-2026-40684

In Exim before 4.99.2, on systems using musl libc not glibc, an attacker can crash the connection instance when malformed DNS data is present in PTR records. This is caused by a dnexpand oddity in octal printing...

CVE-2026-40686

CVE-2026-40686 affects Exim before 4.99.2 when utf8 operators are enabled. The vulnerability is an out-of-bounds read triggered by large UTF-8 trailing characters in malformed UTF-8 header data, with the potential for information disclosure via an error message produced during handling of an unre...

CVE-2026-40684

In Exim before 4.99.2, on systems using musl libc (not glibc), a vulnerability can crash the connection instance when malformed DNS PTR data is present. The issue arises from a dn_expand octal printing oddity in the handling of PTR records, as described in multiple sources. Affected software/comp...

CVE-2026-40685

Exim before 4.99.2 is affected when JSON lookup is enabled. An out-of-bounds heap write can occur if a JSON operator encounters malformed JSON in an untrusted header, caused by an incorrect implementation of the JSON skipping logic. CVSS v3.1 metrics indicate a high-severity, remote-execution-lik...

CVE-2026-40685

In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator encounters malformed JSON in an untrusted header, because of an incorrect implementation of \ skipping...

CVE-2026-40686

In Exim before 4.99.2, when utf8 operators are enabled, there is an out-of-bounds read if large UTF-8 trailing characters are present malformed UTF-8 header data. Information might be divulged within an error message produced during handling of an unrelated e-mail message...

CVE-2026-40684

In Exim before 4.99.2, on systems using musl libc not glibc, an attacker can crash the connection instance when malformed DNS data is present in PTR records. This is caused by a dnexpand oddity in octal printing...

CVE-2026-40687

In Exim before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can be an out-of-bounds write that crashes the connection instance, or erroneous data processing that divulges data from uninitialized heap memory...

PT-2026-36196

Name of the Vulnerable Software and Affected Versions Exim versions prior to 4.99.2 Description An out-of-bounds heap write can occur when JSON lookup is enabled. This happens when a JSON operator processes malformed JSON within an untrusted header due to an incorrect implementation of backslash...

Exploit for Out-of-bounds Write in Exim

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PT-2026-36197

Name of the Vulnerable Software and Affected Versions Exim versions prior to 4.99.2 Description An out-of-bounds read occurs when utf8 operators are enabled and malformed UTF-8 header data containing large UTF-8 trailing characters is processed. This issue may allow a remote attacker to cause...

Advisory ROSA-SA-2026-3248

software: exim 4.99.1 OS: ROSA-CHROME unaffected versions = exim-4.99.1-1 affected versions exim-4.99.1-1 CVE-ID: CVE-2025-67896 BDU-ID: 2026-00906 CVE-Crit: CRITICAL. CVE-DESC.: A vulnerability in the Exim mail server is related to a buffer overflow in dynamic memory. Exploitation of the...

PT-2026-36198

Name of the Vulnerable Software and Affected Versions Exim versions prior to 4.99.2 Description When the SPA authentication driver is used with an adversarial SPA resource, an out-of-bounds write can occur, leading to a crash of the connection instance. Additionally, erroneous data processing may...

ROS-20260310-73-0017

An Exim mail server vulnerability is related to a buffer overflow in dynamic memory. Exploitation of the vulnerability could allow an attacker acting remotely to cause a denial of service...

OESA-2026-1382 exim security update

Exim is a message transfer agent MTA developed at the University of Cambridge for use on Unix systems connected to the Internet. It is freely available under the terms of the GNU General Public Licence. In style it is similar to Smail 3, but its facilities are more general. There is a great deal ...

📄 Qualys Security Advisory - Exim 21Nails Advisory

Qualys audited central parts of the Exim mail server and discovered 21 vulnerabilities, with 11 being local vulnerabilities and 10 being remote vulnerabilities. This is older research from 2021 that was missing from the archive. Qualys Security Advisory 21Nails: Multiple vulnerabilities in Exim...

The vulnerability of the Exim mail server, related to overflowing buffers in dynamic memory, allows a hacker to cause a service failure.

The vulnerability of the Exim mail server is related to overflowing buffers in dynamic memory. Exploiting this vulnerability can allow a remote attacker to cause service interruptions...

Exploit for OS Command Injection in Exim

Cr.Exim 4.87 - 4.91 - Local Privilege Escalation Cr.Link: https...

[SECURITY] Fedora 43 Update: exim-4.99.1-1.fc43

Exim is a message transfer agent MTA developed at the University of Cambridge for use on Unix systems connected to the Internet. It is freely available under the terms of the GNU General Public Licence. In style it is similar to Smail 3, but its facilities are more general. There is a great deal ...