---
cve: "CVE-2026-91018"
severity: "HIGH"
cvss: 8.7
epss: "28.5%"
vendor: "lwIP"
kev: false
exploited: false
published: "2026-09-22 21:17:33"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T20:25:34+02:00"
---

# CVE-2026-91018

> 8.7 HIGH · 🧪 PoC

## Beschreibung

lwIP (Lightweight IP) has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim system.

## CVSS-Vektor

```
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Benachbart | warn |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Referenzen

- <https://cgit.git.savannah.gnu.org/cgit/lwip.git>
- <https://www.cisa.gov/news-events/ics-advisories/icsa-26-265-02>
- <https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-265-02.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-91018) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_