Fedora 44 : exim (2026-78bf093219)

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-78bf093219 advisory. This is an update fixing a pre-authentication information disclosure CVE-2026-48840. Tenable has extracted the preceding description block directly from the...

Fedora 43 : exim (2026-71b1e9b455)

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-71b1e9b455 advisory. This is an update fixing a pre-authentication information disclosure CVE-2026-48840. Tenable has extracted the preceding description block directly from the...

[SECURITY] [DLA 4615-1] exim4 security update

------------------------------------------------------------------------- Debian LTS Advisory DLA-4615-1 [email protected] https://www.debian.org/lts/security/ Thorsten Alteholz June 05, 2026 https://wiki.debian.org/LTS -...

CVE-2026-48840

A flaw was found in Exim. In certain proxy configurations, Exim mishandles short data payloads. This can lead to the disclosure of uninitialized stack memory values to a remote client, potentially exposing sensitive information...

Exim 4.88 < 4.99.4 Information Disclosure

According to its banner, the version of Exim running on the remote host is 4.88 or later but prior to 4.99.4. It is, therefore, potentially affected by an information disclosure vulnerability. - Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to...

Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS : Exim vulnerabilities (USN-8382-1)

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8382-1 advisory. Timo Longin discovered that Exim incorrectly handled certain SMTP messages in PIPELINING/CHUNKING configurations. A...

USN-8382-1: Exim vulnerabilities

Timo Longin discovered that Exim incorrectly handled certain SMTP messages in PIPELINING/CHUNKING configurations. A remote attacker could possibly use this issue to perform SMTP smuggling. This issue only affected Ubuntu 14.04 LTS. CVE-2023-51766 It was discovered that Exim incorrectly handled...

Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : Exim vulnerability (USN-8353-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8353-1 advisory. Warisjeet Singh discovered that Exim with SUPPORTPROXY enabled did not properly handle memory before SMTP authentication. A remote...

USN-8353-1 exim4 vulnerability

Warisjeet Singh discovered that Exim with SUPPORTPROXY enabled did not properly handle memory before SMTP authentication. A remote attacker could possibly use this issue to obtain sensitive information...

USN-8353-1: Exim vulnerability

Warisjeet Singh discovered that Exim with SUPPORTPROXY enabled did not properly handle memory before SMTP authentication. A remote attacker could possibly use this issue to obtain sensitive information...

[BSA-135] Security Update for exim4

Andreas Metzler uploaded new packages for exim4 which fixed the following security problems: CVE-2026-48840 PROXYv2 parser: reject PROXY frames whose declared payload length is too short for the claimed address family 12 bytes for TCPv4/0x11, 36 bytes for TCPv6/0x21. Previously a frame with...

CVE-2026-48840

Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client...

EUVD-2026-33446

Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client...

CVE-2026-48840

Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client...

CVE-2026-48840

Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client...

CVE-2026-48840

Exim is affected: Exim 4.88 prior to 4.99.4 in certain PROXY configurations mishandles short payloads, causing disclosure of uninitialized stack memory to a client. The issue centers on the PROXY-protocol handling, enabling an information disclosure in configurations with SUPPORT_PROXY and host_p...

CVE-2026-48840

Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client...

CVE-2026-48840

Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client...

Exim security vulnerabilities

Exim is an open-source message transfer agent MTA developed by Exim Software, running on Unix systems. It primarily handles the routing, forwarding, and delivery of emails. Versions of Exim from 4.88 to 4.99.4 contained security vulnerabilities. These vulnerabilities stemmed from improper handlin...

CVE-2026-48840: Numeric Range Comparison Without Minimum Check

Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client...