Buffer Overflow Vulnerability in Totolink Router
CVE-2026-42019

9.1CRITICAL

Key Information:

Vendor

Totolink
Status
Totolink
Vendor
CVE Published:
20 October 2026

What is CVE-2026-42019?

Multiple stack-based buffer overflow vulnerabilities have been identified in the pppoe functionality of the Totolink X2000R router. These vulnerabilities can potentially allow an attacker to execute arbitrary code through a specially crafted HTTP request. By manipulating the pppoe_dns1 parameter, authenticated attackers can exploit these vulnerabilities to gain unauthorized access and control over the affected device.

Affected Version(s)

Totolink TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327

References

https://talosintelligence.com/vulnerability_reports/TALOS...

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Discovered by Lilith Wyatt of Cisco Talos
.