{"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/products/w20e/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-2026-19824"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["W20E"],"_cs_severities":["high"],"_cs_tags":[],"_cs_type":"advisory","_cs_vendors":["Tenda"],"content_html":"\u003cp\u003eA critical stack-based buffer overflow vulnerability (CVE-2026-19824) has been identified in Tenda W20E routers running firmware version 15.11.0.6(1068_1546_841)_CN_TDC. The flaw resides in the ipMacBindListStore function within the /goform/addIpMacBind endpoint. By sending a crafted IPMacBindRule argument to this endpoint, a remote, authenticated attacker can trigger a buffer overflow, potentially leading to arbitrary code execution on the affected device. Public exploit code is currently available, increasing the risk of exploitation by opportunistic actors. Given the nature of these edge network devices, successful exploitation provides an attacker with a persistent foothold in the internal network environment.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker performs reconnaissance to identify Tenda W20E devices exposed to the internet.\u003c/li\u003e\n\u003cli\u003eAttacker obtains authenticated access to the device management interface (PR:L).\u003c/li\u003e\n\u003cli\u003eAttacker crafts a malicious HTTP POST request targeting the /goform/addIpMacBind endpoint.\u003c/li\u003e\n\u003cli\u003eThe request includes an oversized or malformed IPMacBindRule argument designed to exceed the allocated stack buffer.\u003c/li\u003e\n\u003cli\u003eThe ipMacBindListStore function processes the malicious argument without sufficient bounds checking.\u003c/li\u003e\n\u003cli\u003eThe stack-based buffer overflow occurs, overwriting adjacent memory space.\u003c/li\u003e\n\u003cli\u003eAttacker redirects the instruction pointer to injected shellcode to achieve arbitrary code execution.\u003c/li\u003e\n\u003cli\u003eFinal objective is achieved, such as establishing persistent C2 or pivot access into the internal network.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-19824 allows for remote code execution with the privileges of the web management service. This can lead to full device compromise, allowing the attacker to intercept traffic, conduct man-in-the-middle attacks, or use the router as a pivot point to attack other internal systems. As Tenda W20E devices are often deployed in small-to-medium enterprise environments, the potential for lateral movement and broad data access is high.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIdentify and isolate all vulnerable Tenda W20E devices running firmware version 15.11.0.6(1068_1546_841)_CN_TDC from the public internet.\u003c/li\u003e\n\u003cli\u003eDisable remote management access on the WAN interface immediately to mitigate the reachability of the /goform/addIpMacBind endpoint.\u003c/li\u003e\n\u003cli\u003eDeploy the provided webserver detection rule to monitor for exploitation attempts against the affected URI.\u003c/li\u003e\n\u003cli\u003eCheck official Tenda support channels for firmware updates that address the vulnerability and apply them as soon as they become available.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-08-14T14:13:17Z","date_published":"2026-08-14T14:13:17Z","id":"https://feed.craftedsignal.io/briefs/2026-08-tenda-w20e-overflow/","summary":"Tenda W20E firmware version 15.11.0.6(1068_1546_841)_CN_TDC contains a stack-based buffer overflow in the /goform/addIpMacBind function, allowing for remote exploitation via the IPMacBindRule argument.","title":"Remote Stack-Based Buffer Overflow in Tenda W20E","url":"https://feed.craftedsignal.io/briefs/2026-08-tenda-w20e-overflow/"}],"language":"en","title":"CraftedSignal Threat Feed - W20E","version":"https://jsonfeed.org/version/1.1"}