{"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/vigorswitch/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":7.2,"id":"CVE-2026-71916"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["VigorSwitch"],"_cs_severities":["high"],"_cs_tags":["vulnerability","remote-code-execution","network-infrastructure"],"_cs_type":"advisory","_cs_vendors":["DrayTek"],"content_html":"\u003cp\u003eDrayTek VigorSwitch models contain a critical command injection vulnerability identified as CVE-2026-71916. The flaw resides within the commandTable function of the web management interface. It stems from improper input sanitization, where special characters, specifically backticks, newline characters, and single quotes, are not adequately filtered in the parameter field. An authenticated remote attacker possessing administrative credentials can supply crafted input to this parameter to execute arbitrary system commands. Because the service operates with root privileges, successful exploitation results in complete compromise of the affected network device. This vulnerability highlights the importance of protecting administrative interfaces from unauthorized access and strictly validating input processed by system-level functions.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker gains administrative access to the VigorSwitch web management interface through compromised credentials or brute force.\u003c/li\u003e\n\u003cli\u003eAttacker navigates to the configuration or diagnostic page that utilizes the commandTable function.\u003c/li\u003e\n\u003cli\u003eAttacker intercepts or crafts an HTTP POST request targeting the parameter field associated with the commandTable functionality.\u003c/li\u003e\n\u003cli\u003eAttacker embeds shell metacharacters (e.g., backticks, semicolons, or newlines) and malicious commands into the parameter input.\u003c/li\u003e\n\u003cli\u003eThe web application fails to sanitize the input, passing the malicious payload directly to the underlying system shell.\u003c/li\u003e\n\u003cli\u003eThe switch executes the injected command with the privileges of the web management service (root).\u003c/li\u003e\n\u003cli\u003eAttacker establishes persistence, exfiltrates sensitive network configuration data, or pivots deeper 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-2026-71916 allows an authenticated attacker to execute arbitrary commands with root privileges on the targeted DrayTek VigorSwitch. This can lead to full device control, interception of network traffic, modification of switch configurations, and potential lateral movement into the local network segment. Organizations relying on these switches for critical network infrastructure are at risk of complete traffic inspection and disruption if administrative credentials are compromised.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the latest firmware patches provided by DrayTek to address CVE-2026-71916.\u003c/li\u003e\n\u003cli\u003eRestrict access to the VigorSwitch web management interface to trusted management subnets or IP addresses only.\u003c/li\u003e\n\u003cli\u003eImplement multi-factor authentication (MFA) for all administrative accounts if supported, and mandate strong, unique passwords to prevent unauthorized access to the management console.\u003c/li\u003e\n\u003cli\u003eMonitor webserver logs or network traffic for anomalous HTTP POST requests containing shell metacharacters directed at switch management endpoints.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-08-24T20:03:45Z","date_published":"2026-08-24T20:03:45Z","id":"https://feed.craftedsignal.io/briefs/2026-08-draytek-command-injection/","summary":"Authenticated attackers can exploit a command injection flaw in the DrayTek VigorSwitch commandTable function to achieve root-level remote code execution.","title":"Command Injection Vulnerability in DrayTek VigorSwitch","url":"https://feed.craftedsignal.io/briefs/2026-08-draytek-command-injection/"}],"language":"en","title":"CraftedSignal Threat Feed - VigorSwitch","version":"https://jsonfeed.org/version/1.1"}