{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-7248/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":9.8,"id":"CVE-2026-7248"}],"_cs_exploited":false,"_cs_products":["DI-8100"],"_cs_severities":["critical"],"_cs_tags":["cve-2026-7248","buffer-overflow","d-link","router"],"_cs_type":"advisory","_cs_vendors":["D-Link"],"content_html":"\u003cp\u003eA critical buffer overflow vulnerability, identified as CVE-2026-7248, affects the D-Link DI-8100 router, specifically version 16.07.26A1. The vulnerability resides within the \u003ccode\u003etgfile_htm\u003c/code\u003e function of the \u003ccode\u003etgfile.htm\u003c/code\u003e file, a component of the CGI endpoint. By crafting a malicious request targeting the \u003ccode\u003efn\u003c/code\u003e argument, a remote, unauthenticated attacker can trigger a buffer overflow, potentially leading to arbitrary code execution. This vulnerability is particularly concerning as a proof-of-concept exploit has been publicly released, increasing the likelihood of exploitation. Routers are often targeted due to their exposure to the internet and the potential to compromise entire networks.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable D-Link DI-8100 router running firmware version 16.07.26A1.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP request targeting the \u003ccode\u003etgfile.htm\u003c/code\u003e CGI endpoint.\u003c/li\u003e\n\u003cli\u003eThe malicious request includes an overly long string in the \u003ccode\u003efn\u003c/code\u003e argument.\u003c/li\u003e\n\u003cli\u003eThe router\u0026rsquo;s web server processes the request and passes the \u003ccode\u003efn\u003c/code\u003e argument to the \u003ccode\u003etgfile_htm\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003etgfile_htm\u003c/code\u003e function fails to properly validate the length of the \u003ccode\u003efn\u003c/code\u003e argument.\u003c/li\u003e\n\u003cli\u003eA buffer overflow occurs when the overly long \u003ccode\u003efn\u003c/code\u003e argument is copied into a fixed-size buffer.\u003c/li\u003e\n\u003cli\u003eThe buffer overflow overwrites adjacent memory, potentially including return addresses or other critical data.\u003c/li\u003e\n\u003cli\u003eThe attacker gains arbitrary code execution on the router, potentially allowing them to take full control of the device.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability allows an attacker to remotely execute arbitrary code on the D-Link DI-8100 router. This could lead to a complete compromise of the device, allowing the attacker to intercept network traffic, modify router settings, or use the router as a launchpad for further attacks against other devices on the network. Given the public availability of an exploit, widespread exploitation is possible, potentially affecting numerous home and small business networks.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor web server logs for abnormally long \u003ccode\u003efn\u003c/code\u003e parameters in requests to \u003ccode\u003e/tgfile.htm\u003c/code\u003e using the provided Sigma rule to detect potential exploitation attempts.\u003c/li\u003e\n\u003cli\u003eImplement rate limiting on HTTP requests to the router\u0026rsquo;s web interface to mitigate brute-force exploitation attempts.\u003c/li\u003e\n\u003cli\u003eSince the source material only identifies a vulnerability, without a patch, consider replacing the affected device.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-28T09:16:18Z","date_published":"2026-04-28T09:16:18Z","id":"/briefs/2026-04-dlink-di-8100-bo/","summary":"A buffer overflow vulnerability in the D-Link DI-8100 router allows remote attackers to execute arbitrary code by manipulating the 'fn' argument in the tgfile_htm function of the CGI endpoint.","title":"D-Link DI-8100 Remote Buffer Overflow Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-04-dlink-di-8100-bo/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-7248","version":"https://jsonfeed.org/version/1.1"}