---
cve: "CVE-2026-8836"
severity: "CRITICAL"
cvss: 9.3
epss: "1%"
vendor: "n/a"
kev: false
exploited: false
published: "2026-05-18 19:16:28"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T19:26:41+02:00"
---

# CVE-2026-8836

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 0c957ec03054eb6c8205e9c9d1d05d90ada3898c (Commit)
- 0c957ec03054eb6c8205e9c9d1d05d90ada3898c (Commit)

## Referenzen

- <https://vuldb.com/vuln/364474>
- <https://vuldb.com/vuln/364474/cti>
- <https://vuldb.com/submit/829798>
- <https://savannah.nongnu.org/bugs/?68194>
- <https://cgit.git.savannah.gnu.org/cgit/lwip.git/commit/?id=0c957ec03054eb6c8205e9c9d1d05d90ada3898c>
- <https://github.com/lwip-tcpip/lwip/commit/0c957ec03054eb6c8205e9c9d1d05d90ada3898c>
- <https://savannah.nongnu.org/bugs/?68055>
- <https://vuldb.com/cve/CVE-2026-8836>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-8836) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_