CVE-2026-10259 in Magic B0
Summary
by MITRE • 06/01/2026
A security vulnerability has been detected in H3C Magic B0 up to 100R002. The affected element is the function SetMobileAPInfoById of the file /goform/aspForm. Such manipulation of the argument param leads to stack-based buffer overflow. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 06/13/2026
The security vulnerability identified in H3C Magic B0 version 100R002 represents a critical stack-based buffer overflow flaw within the SetMobileAPInfoById function of the /goform/aspForm component. This vulnerability resides in the web-based management interface of the device, specifically targeting the parameter handling mechanism that processes mobile AP configuration data. The flaw stems from inadequate input validation and bounds checking within the affected function, creating a pathway for malicious actors to manipulate the param argument and subsequently overflow the allocated stack buffer. The vulnerability's remote exploitability means that attackers can leverage this weakness without requiring physical access to the device, making it particularly dangerous in networked environments where such devices are commonly deployed.
The technical execution of this buffer overflow vulnerability follows established patterns that align with common software security flaws categorized under CWE-121 Stack-based Buffer Overflow. The attack vector involves sending specially crafted input parameters to the SetMobileAPInfoById function through the web interface, which then processes these inputs without proper sanitization. When the function attempts to store the malicious input data beyond the allocated buffer space, it overwrites adjacent stack memory locations, potentially allowing attackers to execute arbitrary code or cause system instability. The lack of response from the vendor despite early disclosure indicates a potential delay in remediation efforts, leaving devices in the field vulnerable to exploitation by threat actors who may have already developed public exploits for this specific vulnerability.
The operational impact of this vulnerability extends beyond simple system crashes or denial of service conditions, as it provides attackers with potential code execution capabilities that could compromise the entire device. In enterprise environments where H3C Magic B0 devices are deployed for network management and wireless connectivity, such a vulnerability could enable attackers to gain unauthorized access to sensitive network configurations, potentially leading to broader network infiltration. The device's role as a wireless access point makes it an attractive target for attackers seeking to establish persistent access points within networks, while the remote exploitability means that attackers can target these devices from anywhere on the internet. Organizations using this equipment should consider the vulnerability as a high-priority risk requiring immediate attention, particularly given the public availability of exploit code that could be leveraged by both skilled and less sophisticated threat actors.
Mitigation strategies for this vulnerability should prioritize immediate vendor patching and firmware updates where available, though the vendor's lack of response presents a significant challenge. Network segmentation and access control measures can provide temporary protection by limiting exposure of these devices to untrusted networks and reducing the attack surface. Implementing network monitoring and intrusion detection systems can help identify exploitation attempts, while disabling unnecessary web management interfaces and restricting access to only trusted IP addresses provides additional layers of defense. Organizations should also consider conducting thorough vulnerability assessments of their entire network infrastructure to identify other potentially affected devices that may share similar software components or architectural patterns. The ATT&CK framework categorizes this type of vulnerability under techniques involving command and control communications, where attackers can establish persistent access through code execution capabilities, making early remediation essential to prevent long-term compromise of network infrastructure.