{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-7101/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":8.8,"id":"CVE-2026-7101"}],"_cs_exploited":false,"_cs_products":["F456 (1.0.0.5)"],"_cs_severities":["critical"],"_cs_tags":["cve-2026-7101","buffer-overflow","router","tenda","remote-code-execution"],"_cs_type":"advisory","_cs_vendors":["Tenda"],"content_html":"\u003cp\u003eA critical buffer overflow vulnerability, identified as CVE-2026-7101, has been discovered in Tenda F456 router version 1.0.0.5. The vulnerability resides in the \u003ccode\u003efromWrlclientSet\u003c/code\u003e function within the \u003ccode\u003e/goform/WrlclientSet\u003c/code\u003e file, which is part of the router\u0026rsquo;s httpd component. Successful exploitation allows remote attackers to execute arbitrary code on the device. Publicly available exploit code exists, increasing the risk of widespread exploitation. This vulnerability poses a significant threat to home and small business networks using the affected Tenda router model, potentially leading to complete device compromise and unauthorized network access. The vulnerability was published on 2026-04-27 and is tracked by VulDB.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker identifies a vulnerable Tenda F456 router running firmware version 1.0.0.5.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP request targeting the \u003ccode\u003e/goform/WrlclientSet\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eThe crafted request includes an oversized payload designed to overflow the buffer in the \u003ccode\u003efromWrlclientSet\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003ehttpd\u003c/code\u003e process attempts to process the request without proper bounds checking.\u003c/li\u003e\n\u003cli\u003eThe buffer overflow occurs, overwriting adjacent memory regions, including critical program data and execution pointers.\u003c/li\u003e\n\u003cli\u003eThe attacker gains control of the program execution flow.\u003c/li\u003e\n\u003cli\u003eThe attacker executes arbitrary code on the router, potentially including shell commands or custom malware.\u003c/li\u003e\n\u003cli\u003eThe attacker achieves complete control of the router, potentially enabling network reconnaissance, data exfiltration, or further attacks on the local network.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this buffer overflow vulnerability allows a remote attacker to execute arbitrary code on the Tenda F456 router. This can lead to complete device compromise, allowing the attacker to control network traffic, modify router settings, or use the compromised device as a pivot point for further attacks within the network. Given the wide usage of Tenda routers in home and small business environments, a successful widespread exploitation could impact thousands of users.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade to a patched firmware version if available from the vendor.\u003c/li\u003e\n\u003cli\u003eImplement network segmentation to limit the impact of a compromised router.\u003c/li\u003e\n\u003cli\u003eMonitor web server logs for suspicious activity targeting the \u003ccode\u003e/goform/WrlclientSet\u003c/code\u003e endpoint using the provided Sigma rule.\u003c/li\u003e\n\u003cli\u003eImplement an IPS rule to detect and block exploit attempts targeting CVE-2026-7101.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-27T09:19:31Z","date_published":"2026-04-27T09:19:31Z","id":"/briefs/2026-04-tenda-f456-buffer-overflow/","summary":"A buffer overflow vulnerability in Tenda F456 version 1.0.0.5 allows remote attackers to execute arbitrary code via a crafted request to the fromWrlclientSet function in the /goform/WrlclientSet file of the httpd component.","title":"Tenda F456 Router Buffer Overflow Vulnerability (CVE-2026-7101)","url":"https://feed.craftedsignal.io/briefs/2026-04-tenda-f456-buffer-overflow/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-7101","version":"https://jsonfeed.org/version/1.1"}