CVE-2026-48840 MEDIUM

CVE-2026-48840

Vendor Exim
Product Exim
Weakness CWE-839
Published May 30, 2026
Last update June 5, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 30, 2026 CVE published
June 5, 2026 Record updated