---
cve: "CVE-2026-82539"
severity: "CRITICAL"
cvss: 9.4
epss: "72.8%"
vendor: "Totolink"
kev: false
exploited: false
published: "2026-08-30 11:17:35"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T19:24:00+02:00"
---

# CVE-2026-82539

> 9.4 CRITICAL · 🧪 PoC

## Beschreibung

A vulnerability was determined in TOTOLINK A720R 4.1.5cu.630_B20250509. This impacts the function setMacFilterRules of the file cstecgi.cgi of the component MAC Filtering. Executing a manipulation of the argument desc can lead to memory corruption. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.

## CVSS-Vektor

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

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

## Referenzen

- <https://vuldb.com/vuln/397055>
- <https://vuldb.com/vuln/397055/cti>
- <https://vuldb.com/cve/CVE-2026-82539>
- <https://vuldb.com/submit/888696>
- <https://github.com/Xernary/CVE-2026-82539>
- <https://www.totolink.net/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-82539) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_