CVE-2026-48840

MEDIUM

Exim < 4.99.4 - Numeric Range Comparison Without Minimum Check

Title source: rule
STIX 2.1

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.

References (4)

Core 4

Scores

CVSS v3 5.3
EPSS 0.0027
EPSS Percentile 19.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-839
Status published
Products (2)
Exim/Exim 4.88 - 4.99.4
exim/exim 4.88 - 4.99.4
Published May 30, 2026
Tracked Since May 30, 2026