Name: CVE-2026-48840: Numeric Range Comparison Without Minimum Check
Creator: Rapid7
Published: 2026-05-30T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-48840, CWE-839, CVSS 5.3, EPSS 0.00441

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.

CVSS Details

CVSS 3.1 Base Score: 5.3
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade exim	Jun 2, 2026	May 30, 2026
Debian	—	Upgrade exim4	May 31, 2026	May 31, 2026
Exim	—	Upgrade Exim to version 4.99.4	Jun 9, 2026	May 30, 2026
Ubuntu	—	Upgrade exim4-base (Ubuntu Pro)Upgrade exim4-dev (Ubuntu Pro)Upgrade exim4-daemon-heavy (Ubuntu Pro)Upgrade exim4-daemon-light (Ubuntu Pro)Upgrade eximon4Upgrade eximon4 (Ubuntu Pro)Upgrade exim4-baseUpgrade exim4 (Ubuntu Pro)Upgrade exim4	Jun 2, 2026	Jun 1, 2026

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CVSS Details

Covered by Rapid7

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