---
cve: "CVE-2026-74233"
severity: "CRITICAL"
cvss: 9.3
epss: "2.6%"
vendor: "Unknown"
kev: false
exploited: true
published: "2026-08-27 13:18:34"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T02:59:07+02:00"
---

# CVE-2026-74233

> 9.3 CRITICAL · 🔓 Exploited

## Beschreibung

Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-EC_QP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain an unauthenticated command injection in the infosrvd service (UDP/9992). A remote unauthenticated attacker can send a crafted UDP packet to execute arbitrary commands as root. The service's authentication uses a hardcoded salt and an all-zero wildcard MAC bypass, rendering it ineffective.

## 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
```

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

## Referenzen

- <http://vulncheck.com/blog/zbt-darklantern-speakingstone>
- <https://www.vulncheck.com/advisories/zbtlink-mqwrt-infosrvd-command-injection>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-74233) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_