---
cve: "CVE-2026-48840"
severity: "MEDIUM"
cvss: 5.3
epss: "26%"
vendor: "exim"
kev: false
exploited: false
published: "2026-05-30 02:16:19"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-15T21:53:16+02:00"
---

# CVE-2026-48840

> 5.3 MEDIUM

## Beschreibung

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-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Referenzen

- <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>
- <https://lists.debian.org/debian-lts-announce/2026/06/msg00004.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-48840) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_