{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-7244/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":9.8,"id":"CVE-2026-7244"}],"_cs_exploited":false,"_cs_products":["A8000RU"],"_cs_severities":["critical"],"_cs_tags":["command injection","router vulnerability","cve-2026-7244"],"_cs_type":"advisory","_cs_vendors":["Totolink"],"content_html":"\u003cp\u003eA critical security vulnerability, identified as CVE-2026-7244, has been discovered in Totolink A8000RU router firmware version 7.1cu.643_b20200521. This flaw resides within the CGI handler, specifically in the \u003ccode\u003esetWiFiEasyGuestCfg\u003c/code\u003e function located in the \u003ccode\u003e/cgi-bin/cstecgi.cgi\u003c/code\u003e file. By manipulating the \u003ccode\u003emerge\u003c/code\u003e argument, a remote attacker can inject and execute arbitrary operating system commands on the affected device. The vulnerability is remotely exploitable and a proof-of-concept exploit has been publicly released, increasing the risk of widespread exploitation. This poses a significant threat as it allows for complete control over the device, potentially leading to data breaches, network compromise, and botnet recruitment.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker sends a malicious HTTP request to the \u003ccode\u003e/cgi-bin/cstecgi.cgi\u003c/code\u003e endpoint on the Totolink A8000RU router.\u003c/li\u003e\n\u003cli\u003eThe request targets the \u003ccode\u003esetWiFiEasyGuestCfg\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts the request to include a payload in the \u003ccode\u003emerge\u003c/code\u003e argument designed to inject an OS command.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003ecstecgi.cgi\u003c/code\u003e script processes the request and passes the \u003ccode\u003emerge\u003c/code\u003e argument to a system call without proper sanitization.\u003c/li\u003e\n\u003cli\u003eThe injected OS command is executed with the privileges of the web server.\u003c/li\u003e\n\u003cli\u003eThe attacker gains arbitrary code execution on the router\u0026rsquo;s operating system.\u003c/li\u003e\n\u003cli\u003eThe attacker can then install malware, change router settings, or use the router as a pivot point to attack other devices on the network.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-7244 grants an attacker complete control over the vulnerable Totolink A8000RU router. This can lead to a variety of malicious activities, including data exfiltration, denial-of-service attacks, and the installation of persistent backdoors. Given the availability of a public exploit, a large number of devices could be compromised quickly. This could result in widespread botnet infections, impacting home users and small businesses relying on these routers for network connectivity.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor web server logs for requests to \u003ccode\u003e/cgi-bin/cstecgi.cgi\u003c/code\u003e with suspicious parameters in the query string, especially related to the \u003ccode\u003emerge\u003c/code\u003e argument to detect exploitation attempts (see rule: \u0026ldquo;Detect Totolink A8000RU Command Injection Attempt\u0026rdquo;).\u003c/li\u003e\n\u003cli\u003eImplement network intrusion detection system (NIDS) rules to identify malicious payloads being sent to the affected endpoint (see rule: \u0026ldquo;Detect Totolink A8000RU Command Injection - Network\u0026rdquo;).\u003c/li\u003e\n\u003cli\u003eApply the Sigma rule \u0026ldquo;Detect Totolink A8000RU Command Injection in Logs\u0026rdquo; to your SIEM to identify successful command injection attempts based on web server logs.\u003c/li\u003e\n\u003cli\u003eMonitor for unusual process execution originating from the web server process, indicating potential exploitation.\u003c/li\u003e\n\u003cli\u003eUnfortunately, a patch is not available so consider migrating to a more secure router.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-28T09:16:17Z","date_published":"2026-04-28T09:16:17Z","id":"/briefs/2026-04-totolink-command-injection/","summary":"A critical OS command injection vulnerability (CVE-2026-7244) exists in the setWiFiEasyGuestCfg function of the /cgi-bin/cstecgi.cgi file in Totolink A8000RU version 7.1cu.643_b20200521, allowing remote attackers to execute arbitrary commands.","title":"Totolink A8000RU Command Injection Vulnerability (CVE-2026-7244)","url":"https://feed.craftedsignal.io/briefs/2026-04-totolink-command-injection/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-7244","version":"https://jsonfeed.org/version/1.1"}