Buffer Overflow Vulnerabilities in Totolink X2000R IPv6 Configuration
CVE-2026-42023

9.1CRITICAL

Key Information:

Vendor

Totolink
Status
Totolink
Vendor
CVE Published:
20 October 2026

What is CVE-2026-42023?

Multiple stack-based buffer overflow vulnerabilities exist in the static network configuration functionality for the IPv6 setup within the Totolink X2000R. These vulnerabilities can be exploited by sending specially crafted HTTP requests that affect the static_ipv6 parameter, potentially allowing authenticated attackers to execute arbitrary code on the device. Proper patching is crucial to mitigate these security risks and protect the integrity of the network.

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
.