CVE-2026-9817
CriticalCVSS 9.1Summary
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.
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-2026-9814Critical
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-2026-9659Critical
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.
- 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)
A stack-based buffer overflow vulnerability exists in the boa formUploadFile 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 this vulnerability.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS