CVE-2026-9659
CriticalCVSS 9.1Summary
Multiple exploitable stack-based buffer overflows in the boa formFilter functionality of X2000R (TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327), involving the vpnUser parameter. A specially crafted HTTP request can lead to arbitrary code execution; authentication is required.
Risk Assessment
High risk — an authenticated attacker can execute arbitrary code on the device and take control of it.
Recommendation
Update X2000R firmware to a non-vulnerable version and restrict access to the administrative interface.
Other vulnerabilities in TOTOLINK X2000R
See all- CVE-2026-9869Critical
A stack-based buffer overflow in the boa formTR069Config functionality of X2000R (TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). A specially crafted HTTP request can lead to arbitrary code execution; authentication is required.
- CVE-2026-9827Critical
An arbitrary file write vulnerability in the boa formUploadFile functionality of X2000R (TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). A specially crafted HTTP request can lead to arbitrary code execution; authentication is required.
- CVE-2026-9817Critical
A stack-based buffer overflow in the boa formUploadFile functionality of X2000R (TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). A specially crafted HTTP request can lead to arbitrary code execution; authentication is required.
- CVE-2026-9814Critical
An OS command injection vulnerability in the boa formWizard newPass functionality of X2000R (TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). A specially crafted HTTP request can lead to arbitrary code execution; authentication is required.
- CVE-2026-9660Critical
Multiple exploitable stack-based buffer overflows in the boa formFilter functionality of X2000R (TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327), involving the vpnPassword parameter. A specially crafted HTTP request can lead to arbitrary code execution; authentication is required.
- CVE-2026-42026Critical
A stack-based buffer overflow exists in the boa formIpv6Setup dhcp_dns functionality of TOTOLINK X2000R (version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327) in the dhcp_dns2 parameter. A specially crafted HTTP request can lead to arbitrary code execution. The vulnerability can be triggered by an authenticated HTTP request.
- CVE-2026-42025Critical
A stack-based buffer overflow exists in the boa formIpv6Setup dhcp_dns functionality of TOTOLINK X2000R (version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327) in the dhcp_dns1 parameter. A specially crafted HTTP request can lead to arbitrary code execution. The vulnerability can be triggered by an authenticated HTTP request.
- CVE-2026-42024Critical
A stack-based buffer overflow exists in the boa formIpv6Setup static network configuration functionality of TOTOLINK X2000R (version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327) in the static_gw parameter. A specially crafted HTTP request can lead to arbitrary code execution. The vulnerability can be triggered by an authenticated HTTP request.
- CVE-2026-42023Critical
A stack-based buffer overflow exists in the boa formIpv6Setup static network configuration functionality of TOTOLINK X2000R (version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327) in the static_ipv6 parameter. A specially crafted HTTP request can lead to arbitrary code execution. The vulnerability can be triggered by an authenticated HTTP request.
- CVE-2026-42022Critical
A stack-based buffer overflow exists in the boa formIpv6Setup static network configuration functionality of TOTOLINK X2000R (version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327) in the static_dns2 parameter. A specially crafted HTTP request can lead to arbitrary code execution. The vulnerability can be triggered by an authenticated HTTP request.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS