Stack-Based Buffer Overflow in TOTOLINK X2000R Router
CVE-2026-9817

9.1CRITICAL

Key Information:

Vendor

Totolink
Status
Totolink
Vendor
CVE Published:
20 October 2026

What is CVE-2026-9817?

A vulnerability exists in the formUploadFile functionality of the TOTOLINK X2000R router, which allows attackers to exploit a stack-based buffer overflow. By crafting a specific HTTP request, an attacker can execute arbitrary code on the device, potentially gaining unauthorized access and control. This security flaw emphasizes the importance of maintaining updated firmware to protect against unauthorized exploitation.

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
.