CVE-2026-78541 in Archer BE3600
Summary
by MITRE • 08/24/2026
A stored OS command injection vulnerability exists in the parent-control module of TP-Link Archer BE3600 V1. An authenticated adjacent attacker with administrative access may store a crafted profile name containing shell metacharacters, which is later processed unsafely during daily cloud report generation and may result in arbitrary command execution.
Successful exploitation may allow command execution on the affected device with potential impact to device confidentiality, integrity, and availability.
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Analysis
by VulDB Data Team • 08/24/2026
The vulnerability identified involves a stored operating system command injection flaw within the parent-control module of TP-Link Archer BE3600 V1 firmware. This specific weakness arises from insufficient sanitization or validation of user-supplied input when it is persisted to storage for later processing. Specifically, an attacker who has already achieved authenticated adjacent access with administrative privileges can manipulate the profile naming mechanism by injecting shell metacharacters into a crafted profile name. Unlike remote code execution vulnerabilities that allow unauthenticated attackers to compromise a system from across a network boundary, this vulnerability requires the adversary to first establish local connectivity and obtain valid administrative credentials. This prerequisite significantly narrows the attack surface but does not eliminate the severity of the potential impact once those initial conditions are met.
The technical mechanism of exploitation relies on how the device processes stored data during its routine operational tasks. When the router generates daily cloud reports, it retrieves previously saved configuration details, including parent-control profiles. The system fails to properly escape or filter special characters within these profile names before passing them as arguments to underlying operating system commands. Consequently, when the command interpreter executes the report generation script, it interprets the injected metacharacters not as literal data but as executable instructions. This allows an attacker to append arbitrary shell commands that are executed with the privileges of the service running the report generator, which typically holds high-level administrative rights on the embedded device.
From a classification perspective, this vulnerability aligns closely with CWE-78 Improper Neutralization of Special Elements used in an OS Command commonly known as OS Command Injection. The stored nature of the payload distinguishes it from reflected injection attacks, placing it within the domain where malicious data is saved to a database or configuration file and executed later by another process. In terms of tactical mapping under the MITRE ATT&CK framework for IoT devices, this behavior corresponds to techniques involving command execution via system utilities and potentially persistence mechanisms if the injected commands modify other configurations. The requirement for administrative access places it within scenarios where an attacker has already compromised a lower-privilege account or exploited another local vulnerability to escalate privileges before leveraging this flaw for broader control.
The operational impact of successful exploitation is severe, granting the adversary arbitrary command execution on the affected device. This capability directly compromises the confidentiality, integrity, and availability of the network infrastructure managed by the router. An attacker could exfiltrate sensitive network traffic data, including credentials stored in browser histories or connected devices, thereby breaching confidentiality. Integrity is compromised as the attacker can modify routing tables, firewall rules, or DNS settings to redirect traffic through malicious servers for man-in-the-middle attacks. Availability is threatened if the injected commands disrupt critical services on the device or cause a denial of service by exhausting system resources. Furthermore, because this router often serves as the gateway for an entire home network, compromise can lead to lateral movement into other connected devices such as smart TVs, cameras, and computers.
Mitigation strategies should focus primarily on immediate patching if available from TP-Link, ensuring that firmware updates address the input validation logic in the parent-control module. In environments where patches are not immediately applied, administrators must enforce strict access controls to prevent unauthorized administrative logins, effectively neutralizing the prerequisite condition for this attack. Network segmentation can also limit the impact by isolating IoT devices and critical infrastructure from general user networks. Additionally, monitoring router logs for unusual command execution patterns or unexpected outbound connections may aid in early detection of exploitation attempts. Long-term resilience requires adopting a zero-trust architecture where no component is trusted implicitly based on its location within the network perimeter, ensuring that even authenticated users are subject to rigorous input validation and least-privilege principles across all administrative interfaces.