{"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/tags/cve-2026-5566/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":8.8,"id":"CVE-2026-5566"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":[],"_cs_severities":["critical"],"_cs_tags":["cve-2026-5566","buffer-overflow","remote-code-execution","utt-hiper"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA critical buffer overflow vulnerability, tracked as CVE-2026-5566, affects UTT HiPER 1250GW devices with firmware versions up to 3.2.7-210907-180535. The vulnerability resides in the \u003ccode\u003estrcpy\u003c/code\u003e function within the \u003ccode\u003e/goform/formNatStaticMap\u003c/code\u003e endpoint. A remote attacker can exploit this vulnerability by crafting a malicious request that overflows the buffer when processing the \u003ccode\u003eNatBind\u003c/code\u003e argument. Publicly available exploits exist, increasing the risk of widespread exploitation. Successful exploitation allows attackers to execute arbitrary code on the affected device, potentially leading to complete system compromise.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker identifies a vulnerable UTT HiPER 1250GW device running a susceptible firmware version (\u0026lt;= 3.2.7-210907-180535).\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP POST request targeting the \u003ccode\u003e/goform/formNatStaticMap\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eThe POST request includes the \u003ccode\u003eNatBind\u003c/code\u003e argument with a value exceeding the buffer size allocated for it.\u003c/li\u003e\n\u003cli\u003eThe vulnerable \u003ccode\u003estrcpy\u003c/code\u003e function within \u003ccode\u003e/goform/formNatStaticMap\u003c/code\u003e is called to copy the attacker-controlled \u003ccode\u003eNatBind\u003c/code\u003e argument into the undersized buffer.\u003c/li\u003e\n\u003cli\u003eThe buffer overflow overwrites adjacent memory regions, potentially including function return addresses or other critical data.\u003c/li\u003e\n\u003cli\u003eThe overwritten return address is replaced with an address pointing to attacker-controlled code.\u003c/li\u003e\n\u003cli\u003eWhen the vulnerable function returns, control is transferred to the attacker's code.\u003c/li\u003e\n\u003cli\u003eThe attacker's code executes with the privileges of the web server process, potentially allowing for complete system compromise.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability allows remote attackers to execute arbitrary code on affected UTT HiPER 1250GW devices. This can lead to complete device compromise, including unauthorized access to network resources, data theft, and denial-of-service conditions. Given the public availability of exploits, organizations using vulnerable devices are at high risk of being targeted.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply available patches or firmware updates provided by UTT to address CVE-2026-5566.\u003c/li\u003e\n\u003cli\u003eMonitor web server logs for suspicious POST requests to \u003ccode\u003e/goform/formNatStaticMap\u003c/code\u003e with unusually long \u003ccode\u003eNatBind\u003c/code\u003e arguments.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026quot;Detect Suspicious NatBind Parameter Length\u0026quot; to identify potential exploitation attempts.\u003c/li\u003e\n\u003cli\u003eImplement network segmentation to limit the impact of a compromised device.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-05T13:17:14Z","date_published":"2026-04-05T13:17:14Z","id":"https://feed.craftedsignal.io/briefs/2026-04-05-utt-hiper-buffer-overflow/","summary":"A buffer overflow vulnerability exists in UTT HiPER 1250GW devices, allowing remote attackers to execute arbitrary code by manipulating the NatBind argument in the /goform/formNatStaticMap endpoint.","title":"UTT HiPER 1250GW Buffer Overflow Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-04-05-utt-hiper-buffer-overflow/"}],"language":"en","title":"CraftedSignal Threat Feed - Cve-2026-5566","version":"https://jsonfeed.org/version/1.1"}