Debian dsa-6400 : exim4 - security update

high Nessus Plugin ID 329376

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6400 advisory.

- ------------------------------------------------------------------------- Debian Security Advisory DSA-6400-1 [email protected] https://www.debian.org/security/ Salvatore Bonaccorso July 24, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : exim4 CVE ID : CVE-2026-66140 CVE-2026-66141

Two vulnerabilities were discovered in Exim, a mail transport agent, which may result in privilege escalation for a local attacker.

For the stable distribution (trixie), these problems have been fixed in version 4.98.2-1+deb13u4.

We recommend that you upgrade your exim4 packages.

For the detailed security status of exim4 please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/exim4

Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/

Mailing list: [email protected]

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the exim4 packages.

Plugin Details

Severity: High

ID: 329376

File Name: debian_DSA-6400.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 7/25/2026

Updated: 7/25/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.15

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-66140

CVSS v3

Risk Factor: High

Base Score: 8.4

Temporal Score: 7.3

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:exim4-base, p-cpe:/a:debian:debian_linux:exim4-config, p-cpe:/a:debian:debian_linux:exim4-daemon-heavy, p-cpe:/a:debian:debian_linux:exim4-daemon-light, p-cpe:/a:debian:debian_linux:exim4-dev, p-cpe:/a:debian:debian_linux:exim4, p-cpe:/a:debian:debian_linux:eximon4

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 7/24/2026

Vulnerability Publication Date: 7/24/2026

Reference Information

CVE: CVE-2026-66140, CVE-2026-66141

Detections

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