Command Injection Vulnerability in Totolink A8000RU Router from Totolink
CVE-2026-7243

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A8000ru
Vendor
CVE Published:
28 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7243?

A command injection vulnerability exists in the Totolink A8000RU router due to improper handling of the maxRtrAdvInterval argument in the setRadvdCfg function within the CGI Handler. An attacker can exploit this flaw remotely to execute arbitrary OS commands, potentially compromising the device's security. The exploit code is publicly available, posing an increased risk to users who have not applied the necessary security measures.

Affected Version(s)

A8000RU 7.1cu.643_b20200521

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-7243 - Proof of Concept

References

https://vuldb.com/vuln/359850
vdb-entrytechnical-description
https://vuldb.com/vuln/359850/cti
signaturepermissions-required
https://vuldb.com/submit/803266
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

LtzHust2 (VulDB User)
.