Buffer Overflow Vulnerability in TOTOLINK X2000R Router
CVE-2026-9869

9.1CRITICAL

Key Information:

Vendor

Totolink
Status
Totolink
Vendor
CVE Published:
20 October 2026

What is CVE-2026-9869?

A stack-based buffer overflow vulnerability exists in the boa formTR069Config functionality of the TOTOLINK X2000R router. This vulnerability can be exploited by sending a specially crafted HTTP request, resulting in potential arbitrary code execution. An attacker must be authenticated to trigger this flaw, allowing them to manipulate the device in malicious ways.

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
.