Stack-Based Buffer Overflow in TOTOLINK X2000R Device
CVE-2026-40615

9.1CRITICAL

Key Information:

Vendor

Totolink
Status
Totolink
Vendor
CVE Published:
20 October 2026

What is CVE-2026-40615?

A stack-based buffer overflow vulnerability in the boa formParentControl deviceName functionality of the TOTOLINK X2000R router can be exploited through specially crafted HTTP requests. When an attacker makes an authenticated request, they may trigger this vulnerability, potentially leading to arbitrary code execution. This concern highlights the importance of secure coding practices and timely software updates to mitigate such security risks.

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
.