CVE-2026-20553 in MT2713
Summary
by MITRE • 11/02/2026
In DA, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11468968; Issue ID: MSV-10166.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 11/02/2026
The vulnerability identified under issue identifier MSV-10166 and addressed by patch ALPS11468968 represents a critical memory safety defect within the Device Architecture, specifically manifesting as an out-of-bounds write operation. This flaw stems from a fundamental absence of bounds checking in specific code paths that handle data input or processing operations. In secure software engineering practices, any access to array indices, buffer offsets, or memory regions must be rigorously validated against allocated limits before execution proceeds. The failure to implement these checks allows an entity with physical access to the device to supply crafted inputs that exceed the intended boundaries of the targeted memory segment. This lack of validation is a classic example of improper input handling where the system fails to distinguish between valid and invalid data ranges, leading directly to unauthorized memory modification.
From a technical perspective, this out-of-bounds write constitutes a severe integrity violation within the operating system or firmware layer. By writing data beyond the allocated buffer boundaries, an attacker can overwrite adjacent memory structures that may contain critical control flow information, such as return addresses on the stack, function pointers in heap metadata, or security-critical variables like privilege flags. This mechanism aligns closely with Common Weakness Enumeration CWE-787, which defines out-of-bounds write vulnerabilities, and often overlaps with CWE-120 regarding buffer overflows when the overflowed data is used to alter program execution flow. The absence of modern memory protection mechanisms or their bypass allows this corruption to persist without immediate detection by standard runtime checks, creating a silent but potent pathway for privilege escalation.
The operational impact of this vulnerability is significant due to its low barrier to exploitation and high severity outcome. Since the attack vector requires only physical access to the device and does not necessitate any prior execution privileges or user interaction, it falls under the ATT&CK technique T1059 Command and Scripting Interpreter in contexts where local code execution leads to further actions, but more accurately reflects direct system compromise via memory corruption techniques. An attacker with physical proximity can exploit this flaw to escalate their privileges from a low-privileged state to that of a root or administrator user. This escalation enables the complete takeover of the device, allowing for unauthorized data exfiltration, installation of persistent malware, modification of firmware settings, and potential pivoting into connected networks if the device serves as an entry point. The lack of required user interaction further exacerbates the risk, making it suitable for automated or opportunistic attacks by individuals with brief physical access to unattended devices.
Mitigation strategies must focus on both immediate patching and long-term architectural improvements. Applying the provided patch ALPS11468968 is the primary remediation step, as it likely introduces the necessary bounds checking logic to prevent writes outside allocated memory regions. Beyond software updates, developers should enforce strict coding standards that mandate input validation for all array accesses and buffer operations. Implementing compiler-based protections such as Stack Canaries, Address Space Layout Randomization (ASLR), and Data Execution Prevention (DEP) can mitigate the exploitability of such vulnerabilities by making it harder to predict memory layouts or execute injected code. Additionally, enabling hardware-enforced security features like ARM TrustZone if available on the platform adds a layer of isolation that can contain breaches within less privileged execution environments. Regular static analysis using tools configured for CWE-787 detection and dynamic fuzzing during development phases are essential practices to identify similar defects before deployment, ensuring robust defense against memory corruption attacks in device architecture components.