{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-7154/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":9.8,"id":"CVE-2026-7154"}],"_cs_exploited":true,"_cs_products":["A8000RU 7.1cu.643_b20200521"],"_cs_severities":["critical"],"_cs_tags":["cve-2026-7154","command-injection","network-device"],"_cs_type":"threat","_cs_vendors":["Totolink"],"content_html":"\u003cp\u003eCVE-2026-7154 describes a critical vulnerability affecting the Totolink A8000RU router, specifically version 7.1cu.643_b20200521. The vulnerability is located in the \u003ccode\u003esetAdvancedInfoShow\u003c/code\u003e function within the \u003ccode\u003e/cgi-bin/cstecgi.cgi\u003c/code\u003e file, which handles CGI requests. An attacker can remotely exploit this flaw by manipulating the \u003ccode\u003etty_server\u003c/code\u003e argument, leading to OS command injection. This means an unauthenticated attacker can potentially execute arbitrary commands on the underlying operating system of the router. The exploit is publicly available, increasing the likelihood of exploitation in the wild. Successful exploitation allows complete control over the device.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable Totolink A8000RU router with the affected firmware version exposed to the internet.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP POST request targeting the \u003ccode\u003e/cgi-bin/cstecgi.cgi\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eThe crafted request includes the \u003ccode\u003esetAdvancedInfoShow\u003c/code\u003e function call with a manipulated \u003ccode\u003etty_server\u003c/code\u003e argument containing an OS command injection payload.\u003c/li\u003e\n\u003cli\u003eThe webserver receives the crafted request and passes the \u003ccode\u003etty_server\u003c/code\u003e argument to the vulnerable function.\u003c/li\u003e\n\u003cli\u003eThe vulnerable function executes the attacker-supplied OS command due to insufficient input validation and sanitization.\u003c/li\u003e\n\u003cli\u003eThe injected command executes with the privileges of the web server process, typically root.\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 use this access to install malware, change router settings, or use the router as a pivot point for further attacks within the network.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-7154 allows a remote, unauthenticated attacker to execute arbitrary commands on the affected Totolink A8000RU router. This can lead to complete compromise of the device, potentially affecting all connected devices on the network. An attacker could steal sensitive information, disrupt network services, or use the compromised router as a botnet node. Given the public availability of the exploit, mass exploitation is a significant risk.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor web server logs for suspicious POST requests to \u003ccode\u003e/cgi-bin/cstecgi.cgi\u003c/code\u003e with unusual characters or command-like syntax in the \u003ccode\u003etty_server\u003c/code\u003e parameter, as this could indicate exploitation attempts (see example Sigma rule below).\u003c/li\u003e\n\u003cli\u003eImplement network intrusion detection system (IDS) rules to detect attempts to exploit this vulnerability by monitoring HTTP traffic for malicious payloads in the \u003ccode\u003etty_server\u003c/code\u003e parameter.\u003c/li\u003e\n\u003cli\u003eApply available patches or firmware updates provided by Totolink to address CVE-2026-7154 when they become available.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-23T12:00:00Z","date_published":"2024-01-23T12:00:00Z","id":"/briefs/2024-01-totolink-a8000ru-command-injection/","summary":"A remote OS command injection vulnerability exists in the Totolink A8000RU router version 7.1cu.643_b20200521, allowing attackers to execute arbitrary commands by manipulating the 'tty_server' argument in the 'setAdvancedInfoShow' function.","title":"Totolink A8000RU OS Command Injection Vulnerability (CVE-2026-7154)","url":"https://feed.craftedsignal.io/briefs/2024-01-totolink-a8000ru-command-injection/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-7154","version":"https://jsonfeed.org/version/1.1"}