---
cve: "CVE-2025-4091"
severity: "HIGH"
cvss: 8.1
epss: "0.5%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2025-04-29 13:13:48"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-03T02:20:35+02:00"
---

# CVE-2025-4091

> 8.1 HIGH

## Beschreibung

Memory safety bugs present in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

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

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

## BSI-Hinweise (deutsch)

- [Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2025-1850)
- [Mozilla Firefox, Firefox ESR, Thunderbird and Thunderbird ESR: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2025-0901)

## Referenzen

- <https://bugzilla.mozilla.org/buglist.cgi?bug_id=1951161%2C1952105>
- <https://www.mozilla.org/security/advisories/mfsa2025-28/>
- <https://www.mozilla.org/security/advisories/mfsa2025-29/>
- <https://www.mozilla.org/security/advisories/mfsa2025-31/>
- <https://www.mozilla.org/security/advisories/mfsa2025-32/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-4091) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_