Stack-based Buffer Overflow Vulnerabilities in TOTOLINK X2000R Router
CVE-2026-42025

9.1CRITICAL

Key Information:

Vendor

Totolink
Status
Totolink
Vendor
CVE Published:
20 October 2026

What is CVE-2026-42025?

The TOTOLINK X2000R router is afflicted by several exploitable stack-based buffer overflow vulnerabilities within the boa formIpv6Setup dhcp_dns functionality. Exploit attempts using specially crafted HTTP requests can lead to arbitrary code execution, posing a significant risk. To exploit these vulnerabilities, an attacker must first authenticate and send a maliciously configured request that manipulates the dhcp_dns1 parameter.

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
.