CVE-2026-48840CWE-839

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…

Medium · published May 30, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
18.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00264 · 18.1th percentile
Weakness
CWE-839 · Numeric Range Comparison Without Minimum Check
Published
2026-05-30T01:50Z
EPSS history
Timeline
  • 30 MAY 01:50Z
    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…
    cvelistv5