CVE-2026-48840
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
9th
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.
| CWE | CWE-839 |
| Vendor | exim |
| Product | exim |
| Published | May 30, 2026 |
| Last Updated | Jun 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
Exim / Exim
4.88 < 4.99.4