{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/h3c/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":8.8,"id":"CVE-2026-6581"}],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["critical"],"_cs_tags":["cve-2026-6581","buffer-overflow","router","h3c"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA critical buffer overflow vulnerability, identified as CVE-2026-6581, affects H3C Magic B1 routers up to version 100R004. The vulnerability resides in the \u003ccode\u003eSetMobileAPInfoById\u003c/code\u003e function within the \u003ccode\u003e/goform/aspForm\u003c/code\u003e file. An attacker can exploit this flaw by crafting a malicious request that manipulates the \u003ccode\u003eparam\u003c/code\u003e argument, leading to a buffer overflow and potential remote code execution. This vulnerability is particularly concerning because a public exploit is available, increasing the risk of widespread exploitation. The vendor was notified about the vulnerability but has not responded. Given the ease of exploitation and the potential for complete system compromise, organizations using affected H3C routers should take immediate action.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable H3C Magic B1 router running a firmware version up to 100R004.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP POST request targeting the \u003ccode\u003e/goform/aspForm\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eThe request includes the \u003ccode\u003eSetMobileAPInfoById\u003c/code\u003e function call with an overly long value for the \u003ccode\u003eparam\u003c/code\u003e argument, triggering the buffer overflow.\u003c/li\u003e\n\u003cli\u003eThe overflow overwrites adjacent memory regions, including the return address on the stack.\u003c/li\u003e\n\u003cli\u003eThe attacker sets the overwritten return address to point to attacker-controlled code or a ROP chain.\u003c/li\u003e\n\u003cli\u003eWhen the \u003ccode\u003eSetMobileAPInfoById\u003c/code\u003e function returns, execution jumps to the attacker-controlled code.\u003c/li\u003e\n\u003cli\u003eThe attacker\u0026rsquo;s code executes with elevated privileges, potentially allowing full control of the router.\u003c/li\u003e\n\u003cli\u003eThe attacker can then use the compromised router to establish a foothold within the network, exfiltrate data, or launch further attacks.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-6581 allows a remote attacker to execute arbitrary code with root privileges on the H3C Magic B1 router. This can lead to complete compromise of the device, allowing the attacker to control network traffic, exfiltrate sensitive data, or use the router as a jumping-off point for further attacks within the network. Given the widespread use of these routers in small to medium-sized businesses and homes, a large number of devices are potentially vulnerable. There is no indication of victim counts or sectors targeted at this time.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDeploy the Sigma rule \u003ccode\u003eDetect H3C Magic B1 Buffer Overflow Attempt\u003c/code\u003e to your SIEM to detect exploitation attempts targeting CVE-2026-6581 via suspicious HTTP POST requests to \u003ccode\u003e/goform/aspForm\u003c/code\u003e (see Sigma rule below).\u003c/li\u003e\n\u003cli\u003eApply appropriate input validation and sanitization measures if you manage the web server to mitigate buffer overflows.\u003c/li\u003e\n\u003cli\u003eMonitor network traffic for unusual activity originating from H3C Magic B1 routers.\u003c/li\u003e\n\u003cli\u003eConsider replacing H3C Magic B1 routers with more secure alternatives if updates are not available.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-19T23:16:33Z","date_published":"2026-04-19T23:16:33Z","id":"/briefs/2026-04-h3c-magic-b1-overflow/","summary":"A buffer overflow vulnerability (CVE-2026-6581) in H3C Magic B1 routers allows remote attackers to execute arbitrary code by manipulating the 'param' argument in the SetMobileAPInfoById function.","title":"H3C Magic B1 Router Buffer Overflow Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-04-h3c-magic-b1-overflow/"},{"_cs_actors":[],"_cs_cves":[{"cvss":8.8,"id":"CVE-2026-6560"}],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["critical"],"_cs_tags":["buffer overflow","cve-2026-6560","h3c","router","network device"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA critical buffer overflow vulnerability (CVE-2026-6560) has been identified in H3C Magic B0 routers, specifically in versions up to 100R002. The vulnerability resides within the \u003ccode\u003eEdit_BasicSSID\u003c/code\u003e function of the \u003ccode\u003e/goform/aspForm\u003c/code\u003e file. An attacker can remotely exploit this flaw by crafting malicious input to the \u003ccode\u003eparam\u003c/code\u003e argument, leading to arbitrary code execution on the device. Public exploits are reportedly available, increasing the risk of widespread exploitation. The vendor was notified about this vulnerability, but has not provided any response or patch as of April 2026. This poses a significant risk to users of the affected H3C Magic B0 routers.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable H3C Magic B0 router running firmware version 100R002 or earlier.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP POST request targeting the \u003ccode\u003e/goform/aspForm\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eThe POST request includes the \u003ccode\u003eEdit_BasicSSID\u003c/code\u003e function call.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003eparam\u003c/code\u003e argument within the POST data contains a specially crafted string exceeding the buffer size allocated in the \u003ccode\u003eEdit_BasicSSID\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eThe buffer overflow occurs when the \u003ccode\u003eEdit_BasicSSID\u003c/code\u003e function processes the oversized \u003ccode\u003eparam\u003c/code\u003e argument without proper bounds checking.\u003c/li\u003e\n\u003cli\u003eThe overflow overwrites adjacent memory regions, potentially including the return address on the stack.\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 gaining full control of the device, exfiltrating data, or using it as a pivot point for further attacks.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this buffer overflow vulnerability (CVE-2026-6560) allows a remote attacker to execute arbitrary code on the affected H3C Magic B0 router. This could lead to a complete compromise of the device, including the ability to modify router settings, intercept network traffic, and potentially gain access to connected devices on the network. Given the availability of public exploits, widespread exploitation is possible, potentially impacting a large number of home and small business networks.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor web server logs for suspicious POST requests to \u003ccode\u003e/goform/aspForm\u003c/code\u003e with unusually long \u003ccode\u003eparam\u003c/code\u003e arguments (refer to the Attack Chain section).\u003c/li\u003e\n\u003cli\u003eImplement rate limiting for requests to \u003ccode\u003e/goform/aspForm\u003c/code\u003e to mitigate potential exploitation attempts (refer to the Attack Chain section).\u003c/li\u003e\n\u003cli\u003eDeploy the following Sigma rule to detect exploitation attempts targeting the vulnerable \u003ccode\u003eEdit_BasicSSID\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eBlock network traffic originating from or destined to H3C Magic B0 devices until a patch is available.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-19T07:16:05Z","date_published":"2026-04-19T07:16:05Z","id":"/briefs/2026-04-h3c-magic-buffer-overflow/","summary":"A buffer overflow vulnerability (CVE-2026-6560) in H3C Magic B0 up to 100R002 allows remote attackers to execute arbitrary code by manipulating the 'param' argument in the Edit_BasicSSID function of the /goform/aspForm file.","title":"H3C Magic B0 Router Buffer Overflow Vulnerability (CVE-2026-6560)","url":"https://feed.craftedsignal.io/briefs/2026-04-h3c-magic-buffer-overflow/"}],"language":"en","title":"CraftedSignal Threat Feed — H3c","version":"https://jsonfeed.org/version/1.1"}