CVE-2026-9659 PUBLISHED

Assigner: talos
Reserved: 26.05.2026 Published: 20.10.2026 Updated: 20.10.2026

Multiple exploitable stack-based buffer overflow vulnerabilities exist in the boa formFilter functionality of X2000R (version(s): TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). A specially crafted HTTP request can lead to arbitrary code execution. An attacker can make an authenticated HTTP request to trigger these vulnerabilities. This vulnerability deals with the vpnUser parameter.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS Score: 9.1

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	totolink
Product	Totolink
Versions	Default: unaffected Version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 is affected

Credits

Discovered by Lilith Wyatt of Cisco Talos

References

https://talosintelligence.com/vulnerability_reports/TALOS-2026-2425

Problem Types

CWE-121: Stack-based Buffer Overflow CWE