{"id":"CVE-2026-42025","published":"2026-10-20T21:17:19.610","lastModified":"2026-10-23T23:17:44.033","description":"Multiple exploitable stack-based buffer overflow vulnerabilities exist in the boa formIpv6Setup dhcp_dns 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 concerns the dhcp_dns1 parameter.","cvssScore":9.1,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","cwes":["CWE-121"],"vendors":[],"products":[],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2026-2396","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"Stack-based buffer overflow in the formIpv6Setup dhcp_dns functionality of X2000R router allows authenticated remote attackers to execute arbitrary code via a specially crafted HTTP request containing a long dhcp_dns1 parameter.","exploitability":"Exploitation requires valid authenticated access to the device's web interface; no public exploit exists, but the vulnerability is straightforward to trigger with a single malformed HTTP POST request.","blast_radius":"Successful exploitation grants full control of the router, enabling pivot to internal networks, DNS hijacking, and potential disruption of all connected devices.","remediation":"Upgrade to TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 or later, as this is the only fixed version explicitly referenced in the description.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","buffer-overflow","web","embedded","authenticated"],"model":"garnet-coder","analyzedAt":"2026-10-25T08:52:58.812Z"}}