CVE-2026-48840
5.3
MEDIUM
CVSS 3.1
EPSS 0.03%
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.
How to fix CVE-2026-48840
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Debian/exim4—no fix listed
Is CVE-2026-48840 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |