{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-5612/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":8.8,"id":"CVE-2026-5612"}],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["critical"],"_cs_tags":["cve-2026-5612","buffer-overflow","belkin"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eCVE-2026-5612 is a critical vulnerability affecting Belkin F9K1015 router firmware version 1.00.10. Specifically, a stack-based buffer overflow can be triggered in the \u003ccode\u003eformWlEncrypt\u003c/code\u003e function located within the \u003ccode\u003e/goform/formWlEncrypt\u003c/code\u003e file. This vulnerability allows a remote attacker to inject arbitrary code by sending a specially crafted request to the router, manipulating the \u003ccode\u003ewebpage\u003c/code\u003e argument. This exploit has been publicly disclosed, increasing the risk of widespread exploitation. Successful exploitation grants the attacker complete control over the device. The vendor was notified, but no response has been received. Given the ease of remote exploitation and the availability of exploit code, immediate action is required to mitigate the risks.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a Belkin F9K1015 router running firmware version 1.00.10.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP POST request targeting the \u003ccode\u003e/goform/formWlEncrypt\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eThe crafted request includes an overly long string in the \u003ccode\u003ewebpage\u003c/code\u003e argument to trigger the buffer overflow.\u003c/li\u003e\n\u003cli\u003eThe router\u0026rsquo;s webserver processes the request and calls the \u003ccode\u003eformWlEncrypt\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003eformWlEncrypt\u003c/code\u003e function copies the attacker-controlled \u003ccode\u003ewebpage\u003c/code\u003e argument into a fixed-size buffer on the stack without proper bounds checking.\u003c/li\u003e\n\u003cli\u003eThe overflow overwrites adjacent memory regions on the stack, including the return address.\u003c/li\u003e\n\u003cli\u003eWhen the \u003ccode\u003eformWlEncrypt\u003c/code\u003e function returns, control is transferred to the attacker-controlled address.\u003c/li\u003e\n\u003cli\u003eThe attacker executes arbitrary code, potentially gaining full control over the router and its network.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-5612 can lead to complete compromise of the Belkin F9K1015 router. An attacker can execute arbitrary code, potentially installing malware, intercepting network traffic, or using the router as a pivot point for further attacks within the network. Given that this vulnerability is remotely exploitable and a public exploit is available, any unpatched Belkin F9K1015 device is at high risk. The lack of vendor response increases the risk, placing responsibility on network defenders.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor web server logs for POST requests to \u003ccode\u003e/goform/formWlEncrypt\u003c/code\u003e with abnormally long \u003ccode\u003ewebpage\u003c/code\u003e parameters to detect potential exploitation attempts. See the provided Sigma rule for an example.\u003c/li\u003e\n\u003cli\u003eImplement network intrusion detection system (NIDS) rules to identify and block suspicious traffic targeting the \u003ccode\u003e/goform/formWlEncrypt\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eSince a public exploit exists, consider blocking all traffic to the \u003ccode\u003e/goform/formWlEncrypt\u003c/code\u003e endpoint as a temporary mitigation measure until a patch is available.\u003c/li\u003e\n\u003cli\u003eUnfortunately, since the vendor is non-responsive, end-of-life (EOL) of these devices should be considered.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-06T03:16:07Z","date_published":"2026-04-06T03:16:07Z","id":"/briefs/2026-04-belkin-overflow/","summary":"A stack-based buffer overflow vulnerability (CVE-2026-5612) exists in Belkin F9K1015 1.00.10, allowing remote attackers to execute arbitrary code by manipulating the 'webpage' argument in the 'formWlEncrypt' function of the '/goform/formWlEncrypt' file.","title":"Belkin F9K1015 Stack-Based Buffer Overflow Vulnerability (CVE-2026-5612)","url":"https://feed.craftedsignal.io/briefs/2026-04-belkin-overflow/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-5612","version":"https://jsonfeed.org/version/1.1"}