{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-7219/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":7.2,"id":"CVE-2026-7219"}],"_cs_exploited":false,"_cs_products":["N300RT"],"_cs_severities":["high"],"_cs_tags":["buffer-overflow","iot","router","cve-2026-7219"],"_cs_type":"advisory","_cs_vendors":["Totolink"],"content_html":"\u003cp\u003eA buffer overflow vulnerability, identified as CVE-2026-7219, has been discovered in Totolink N300RT router firmware version 3.4.0-B20250430. The vulnerability resides within the \u003ccode\u003e/boafrm/formIpQoS\u003c/code\u003e file and is triggered by manipulating the \u003ccode\u003eentry_name\u003c/code\u003e argument. An attacker can exploit this flaw remotely to potentially execute arbitrary code on the device. Publicly available exploit code exists, increasing the risk of exploitation. This vulnerability poses a significant threat to devices running the affected firmware, potentially allowing attackers to gain unauthorized access and control over the router.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker identifies a Totolink N300RT device running firmware version 3.4.0-B20250430.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP request targeting the \u003ccode\u003e/boafrm/formIpQoS\u003c/code\u003e file.\u003c/li\u003e\n\u003cli\u003eThe crafted request includes a payload designed to overflow the buffer associated with the \u003ccode\u003eentry_name\u003c/code\u003e argument.\u003c/li\u003e\n\u003cli\u003eThe router\u0026rsquo;s web server processes the malicious request, leading to a buffer overflow condition.\u003c/li\u003e\n\u003cli\u003eThe attacker overwrites adjacent memory regions, potentially including return addresses or other critical data.\u003c/li\u003e\n\u003cli\u003eUpon function return, the overwritten return address is used, diverting execution flow to attacker-controlled code.\u003c/li\u003e\n\u003cli\u003eThe attacker gains arbitrary code execution on the device.\u003c/li\u003e\n\u003cli\u003eThe attacker can then use this access to modify router settings, intercept network traffic, or establish a persistent backdoor.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability allows a remote attacker to execute arbitrary code on the Totolink N300RT device. This could lead to complete compromise of the router, enabling attackers to monitor network traffic, change DNS settings, or use the device as part of a botnet. Given the number of Totolink N300RT devices deployed, this vulnerability could have a widespread impact, especially for home and small business users.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor web server logs for requests targeting \u003ccode\u003e/boafrm/formIpQoS\u003c/code\u003e with unusually long \u003ccode\u003eentry_name\u003c/code\u003e parameters to detect potential exploitation attempts. Implement the Sigma rule \u003ccode\u003eDetect Suspicious Totolink FormIpQoS Requests\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eApply firmware updates as soon as they are released by Totolink to patch CVE-2026-7219.\u003c/li\u003e\n\u003cli\u003eImplement network segmentation to limit the impact of a compromised router on other devices on the network.\u003c/li\u003e\n\u003cli\u003eConsider using a web application firewall (WAF) to filter out malicious requests targeting the router\u0026rsquo;s web interface and activate the \u003ccode\u003eDetect Large POST Requests to Router Config Pages\u003c/code\u003e Sigma rule.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-28T04:16:23Z","date_published":"2026-04-28T04:16:23Z","id":"/briefs/2026-04-totolink-n300rt-bo/","summary":"A remote buffer overflow vulnerability exists in Totolink N300RT 3.4.0-B20250430 via manipulation of the 'entry_name' argument in the /boafrm/formIpQoS file, potentially leading to arbitrary code execution.","title":"Totolink N300RT Buffer Overflow Vulnerability (CVE-2026-7219)","url":"https://feed.craftedsignal.io/briefs/2026-04-totolink-n300rt-bo/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-7219","version":"https://jsonfeed.org/version/1.1"}