{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/products/f456-1.0.0.5/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":8.8,"id":"CVE-2026-7033"}],"_cs_exploited":false,"_cs_products":["F456 1.0.0.5"],"_cs_severities":["critical"],"_cs_tags":["buffer-overflow","remote-code-execution","cve-2026-7033","router"],"_cs_type":"advisory","_cs_vendors":["Tenda"],"content_html":"\u003cp\u003eA buffer overflow vulnerability has been identified in Tenda F456 router, specifically version 1.0.0.5. The vulnerability resides within the \u003ccode\u003efromSafeClientFilter\u003c/code\u003e function located in the \u003ccode\u003e/goform/SafeClientFilter\u003c/code\u003e file. Successful exploitation allows a remote attacker to inject and execute arbitrary code. Publicly available exploit code exists, increasing the risk of widespread exploitation targeting vulnerable Tenda F456 devices. This issue poses a significant threat to network security, as a compromised router can lead to data breaches, denial of service, or further network intrusion.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a Tenda F456 router running firmware version 1.0.0.5 exposed to the internet.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP POST request targeting the \u003ccode\u003e/goform/SafeClientFilter\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eThe crafted request includes a specially designed payload within the \u003ccode\u003emenufacturer/Go\u003c/code\u003e argument. This payload is designed to trigger a buffer overflow in the \u003ccode\u003efromSafeClientFilter\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003efromSafeClientFilter\u003c/code\u003e function processes the malicious input without proper bounds checking.\u003c/li\u003e\n\u003cli\u003eThe oversized payload overwrites adjacent memory regions, potentially including return addresses or other critical data.\u003c/li\u003e\n\u003cli\u003eWhen the \u003ccode\u003efromSafeClientFilter\u003c/code\u003e function attempts to return, the overwritten return address is used, redirecting execution flow to attacker-controlled memory.\u003c/li\u003e\n\u003cli\u003eThe attacker-controlled memory contains shellcode or other malicious instructions.\u003c/li\u003e\n\u003cli\u003eThe router executes the attacker\u0026rsquo;s code, granting the attacker control over the device.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability can result in complete compromise of the Tenda F456 router. An attacker can gain unauthorized access to network traffic, modify router settings, or use the compromised device as a launchpad for further attacks within the network. Given the public availability of exploit code, a large number of Tenda F456 routers could be targeted, potentially affecting numerous home and small business networks. A successful attack could lead to data theft, service disruption, and reputational damage.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply any available patches or firmware updates released by Tenda to address CVE-2026-7033 on the F456 1.0.0.5 routers.\u003c/li\u003e\n\u003cli\u003eImplement network intrusion detection systems (IDS) or intrusion prevention systems (IPS) rules to detect and block malicious requests targeting the \u003ccode\u003e/goform/SafeClientFilter\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rules provided below to your SIEM to detect exploitation attempts targeting the vulnerable endpoint.\u003c/li\u003e\n\u003cli\u003eMonitor web server logs for suspicious POST requests to \u003ccode\u003e/goform/SafeClientFilter\u003c/code\u003e with abnormally large \u003ccode\u003emenufacturer/Go\u003c/code\u003e argument values.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-26T11:16:06Z","date_published":"2026-04-26T11:16:06Z","id":"/briefs/2026-04-tenda-buffer-overflow/","summary":"A buffer overflow vulnerability in Tenda F456 router version 1.0.0.5 allows a remote attacker to execute arbitrary code by exploiting the fromSafeClientFilter function in the /goform/SafeClientFilter endpoint through manipulation of the 'menufacturer/Go' argument.","title":"Tenda F456 Router Buffer Overflow Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-04-tenda-buffer-overflow/"}],"language":"en","title":"CraftedSignal Threat Feed — F456 1.0.0.5","version":"https://jsonfeed.org/version/1.1"}