{"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-2026-7242/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":9.8,"id":"CVE-2026-7242"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["A8000RU"],"_cs_severities":["critical"],"_cs_tags":["command-injection","rce","totolink","cve-2026-7242"],"_cs_type":"advisory","_cs_vendors":["Totolink"],"content_html":"\u003cp\u003eA critical vulnerability, CVE-2026-7242, has been identified in Totolink A8000RU routers, specifically version 7.1cu.643_b20200521. The vulnerability resides within the CGI handler component, in the \u003ccode\u003e/cgi-bin/cstecgi.cgi\u003c/code\u003e file, affecting the \u003ccode\u003esetOpenVpnClientCfg\u003c/code\u003e function. A remote attacker can exploit this flaw by manipulating the \u003ccode\u003eenabled\u003c/code\u003e argument, leading to arbitrary OS command injection. Public exploit code is available, increasing the risk of widespread exploitation. This vulnerability poses a significant threat, allowing attackers to potentially gain full control of affected devices, compromise network security, and exfiltrate sensitive data.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker identifies a vulnerable Totolink A8000RU router running firmware version 7.1cu.643_b20200521.\u003c/li\u003e\n\u003cli\u003eThe attacker sends a crafted HTTP POST request to \u003ccode\u003e/cgi-bin/cstecgi.cgi\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eThe HTTP request targets the \u003ccode\u003esetOpenVpnClientCfg\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eThe request includes a malicious payload within the \u003ccode\u003eenabled\u003c/code\u003e argument, designed to inject OS commands.\u003c/li\u003e\n\u003cli\u003eThe CGI handler processes the request and executes the injected OS command due to insufficient input validation.\u003c/li\u003e\n\u003cli\u003eThe injected command executes with the privileges of the web server.\u003c/li\u003e\n\u003cli\u003eThe attacker can now execute commands on the router, potentially downloading malware or establishing a reverse shell.\u003c/li\u003e\n\u003cli\u003eThe attacker gains full control of the device, allowing them to modify settings, intercept network traffic, or use the device as a pivot point for further attacks.\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 operating system commands on the affected Totolink A8000RU device. This can lead to full device compromise, allowing attackers to modify router settings, intercept network traffic, or use the compromised device as a point of entry for further attacks on the network. Given the availability of public exploits, a large number of devices are potentially at risk.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply available patches or firmware updates from Totolink to address CVE-2026-7242.\u003c/li\u003e\n\u003cli\u003eImplement network segmentation to limit the impact of a compromised device.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u003ccode\u003eDetect Totolink RCE via cstecgi.cgi\u003c/code\u003e to identify exploitation attempts in web server logs.\u003c/li\u003e\n\u003cli\u003eMonitor network traffic for suspicious outbound connections originating from Totolink devices, indicative of command execution (see IOCs).\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-28T09:16:17Z","date_published":"2026-04-28T09:16:17Z","id":"https://feed.craftedsignal.io/briefs/2026-04-28-totolink-rce/","summary":"A remote OS command injection vulnerability exists in the setOpenVpnClientCfg function of the Totolink A8000RU router (version 7.1cu.643_b20200521) via manipulation of the 'enabled' argument in the /cgi-bin/cstecgi.cgi CGI handler.","title":"Totolink A8000RU OS Command Injection Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-04-28-totolink-rce/"}],"language":"en","title":"CraftedSignal Threat Feed - Cve-2026-7242","version":"https://jsonfeed.org/version/1.1"}