CVE DATABASE / CVE-2026-48840
CVE-2026-48840
CVSS 5.3 · MEDIUM
Summary
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 3.1 breakdown
| Base score | 5.3 (MEDIUM) |
| Vector | 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 |
Weakness type (CWE)
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References
- https://exim.org/static/doc/security/EXIM-Security-2026-05-19.1
- https://www.openwall.com/lists/oss-security/2026/05/29/3
- http://www.openwall.com/lists/oss-security/2026/05/29/3
Data: NIST NVD. NVD last modified 2026-05-30. Always verify against the vendor advisory before acting.