{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","favicon":"https://feed.craftedsignal.io/favicon-32x32.png","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-6630/feed.json","home_page_url":"https://feed.craftedsignal.io/","icon":"https://feed.craftedsignal.io/apple-touch-icon.png","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":8.8,"id":"CVE-2026-6630"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":[],"_cs_severities":["critical"],"_cs_tags":["tenda","router","buffer_overflow","cve-2026-6630","rce"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA critical buffer overflow vulnerability has been identified in Tenda F451 routers running firmware version 1.0.0.7_cn_svn7958. This flaw resides within the \u003ccode\u003efromGstDhcpSetSer\u003c/code\u003e function of the \u003ccode\u003e/goform/GstDhcpSetSer\u003c/code\u003e file, part of the \u003ccode\u003ehttpd\u003c/code\u003e component. The vulnerability can be triggered remotely by manipulating the \u003ccode\u003edips\u003c/code\u003e argument. This can allow an attacker to gain unauthorized access and control over the device. Publicly available exploits exist, increasing the risk of widespread exploitation targeting home and small business networks. This vulnerability poses a significant threat due to the potential for complete system compromise and the relative ease of exploitation.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable Tenda F451 router running firmware version 1.0.0.7_cn_svn7958.\u003c/li\u003e\n\u003cli\u003eThe attacker sends a specially crafted HTTP POST request to the \u003ccode\u003e/goform/GstDhcpSetSer\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eThis POST request contains a malicious payload within the \u003ccode\u003edips\u003c/code\u003e argument, exceeding the buffer's intended size.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003efromGstDhcpSetSer\u003c/code\u003e function processes the request without proper bounds checking on the \u003ccode\u003edips\u003c/code\u003e argument.\u003c/li\u003e\n\u003cli\u003eThis causes a buffer overflow, overwriting adjacent memory regions within the \u003ccode\u003ehttpd\u003c/code\u003e process.\u003c/li\u003e\n\u003cli\u003eThe attacker carefully crafts the overflow payload to overwrite critical data, such as the return address, with the address of attacker-controlled code.\u003c/li\u003e\n\u003cli\u003eWhen the \u003ccode\u003efromGstDhcpSetSer\u003c/code\u003e function returns, execution jumps to the attacker's code.\u003c/li\u003e\n\u003cli\u003eThe attacker's code executes with the privileges of the \u003ccode\u003ehttpd\u003c/code\u003e process, allowing for remote code execution and potential device takeover.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this buffer overflow vulnerability allows a remote attacker to execute arbitrary code on the Tenda F451 router. This can lead to complete compromise of the device, enabling the attacker to modify router settings, intercept network traffic, or use the router as a pivot point for further attacks within the network. Given the number of Tenda F451 devices deployed in homes and small businesses, this vulnerability poses a significant risk to a large number of users.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply available patches from Tenda immediately to remediate CVE-2026-6630.\u003c/li\u003e\n\u003cli\u003eMonitor web server logs for suspicious POST requests targeting the \u003ccode\u003e/goform/GstDhcpSetSer\u003c/code\u003e endpoint using the provided Sigma rule.\u003c/li\u003e\n\u003cli\u003eImplement rate limiting on the \u003ccode\u003e/goform/GstDhcpSetSer\u003c/code\u003e endpoint to mitigate potential brute-force exploitation attempts.\u003c/li\u003e\n\u003cli\u003eConsider deploying a web application firewall (WAF) with rules to detect and block common buffer overflow attack patterns.\u003c/li\u003e\n\u003cli\u003eEnable logging for the httpd process and deploy the process creation Sigma rule to detect any spawned processes from the httpd process.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-20T11:19:22Z","date_published":"2026-04-20T11:19:22Z","id":"https://feed.craftedsignal.io/briefs/2026-04-21-tenda-f451-bo/","summary":"A buffer overflow vulnerability in the Tenda F451 router allows remote attackers to execute arbitrary code by manipulating the 'dips' argument in the fromGstDhcpSetSer function.","title":"Tenda F451 Router Buffer Overflow Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-04-21-tenda-f451-bo/"}],"language":"en","title":"CraftedSignal Threat Feed - Cve-2026-6630","version":"https://jsonfeed.org/version/1.1"}