CVE-2026-48840

Published: May 30, 2026Modified: Jul 22, 2026

5.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitability: 3.9 / Impact: 1.4

Source: MITRE (Secondary)

Description

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.

Affected (1)

Products: Exim: Exim

Exim

1 product

Exim

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Exim Exim	From 4.88 to 4.99.4

Related CWEs

CWE-839

Numeric Range Comparison Without Minimum Check

The product checks a value to ensure that it is less than or equal to a maximum, but it does not also verify that the value is greater than or equal to the minimum.

References (4)

https://exim.org/static/doc/security/EXIM-Security-2026-05-19.1

Source: cve@mitre.org

Vendor Advisory

https://www.openwall.com/lists/oss-security/2026/05/29/3

Source: cve@mitre.org

Mailing ListMitigationThird Party Advisory

http://www.openwall.com/lists/oss-security/2026/05/29/3

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListMitigationThird Party Advisory

https://lists.debian.org/debian-lts-announce/2026/06/msg00004.html

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.