CVE-2026-48840

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 v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://exim.org/static/doc/security/EXIM-Security-2026-05-19.1	Vendor Advisory
https://www.openwall.com/lists/oss-security/2026/05/29/3	Mailing List Mitigation Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/05/29/3	Mailing List Mitigation Third Party Advisory
https://lists.debian.org/debian-lts-announce/2026/06/msg00004.html

Configurations

Configuration 1 (hide)

cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-30 02:16

Updated : 2026-07-22 06:10

NVD link : CVE-2026-48840

Mitre link : CVE-2026-48840

CVE.ORG link : CVE-2026-48840

JSON object : View

Products Affected

exim

exim

CWE

CWE-839

Numeric Range Comparison Without Minimum Check

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