CVE-2025-9828 in CP6
Summary
by MITRE • 09/02/2025
A vulnerability was determined in Tenda CP6 11.10.00.243. The affected element is the function sub_2B7D04 of the component uhttp. Executing manipulation can lead to risky cryptographic algorithm. The attack may be launched remotely. This attack is characterized by high complexity. The exploitability is described as difficult. The exploit has been publicly disclosed and may be utilized.
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Analysis
by VulDB Data Team • 10/03/2025
The vulnerability identified as CVE-2025-9828 affects the Tenda CP6 router model running firmware version 11.10.00.243 and resides within the uhttp component's sub_2B7D04 function. This cryptographic weakness represents a significant security risk for network infrastructure devices that rely on proper encryption mechanisms for secure communications. The vulnerability's presence in the uhttp component suggests it may impact web-based management interfaces and HTTP protocol handling capabilities of the device, potentially compromising the integrity and confidentiality of data transmitted through these channels.
The technical flaw manifests in the improper implementation of cryptographic algorithms within the sub_2B7D04 function, creating opportunities for attackers to manipulate the encryption processes used by the device. This weakness could enable adversaries to perform cryptographic attacks such as man-in-the-middle operations, session hijacking, or data interception that would otherwise be prevented by robust encryption protocols. The vulnerability's classification as high complexity indicates that exploitation requires significant technical expertise and resources, though the public disclosure of the exploit means that skilled attackers may have already developed working implementations. The difficulty level of exploitation suggests that while not trivial, the attack vectors are within reach of determined threat actors who possess sufficient knowledge of embedded systems and network protocols.
The remote attack vector presents a particularly concerning threat model for network administrators, as it allows adversaries to target the device from external networks without requiring physical access or local network presence. This remote accessibility significantly expands the potential attack surface and increases the likelihood of successful exploitation across multiple network environments. The affected device's role as a network gateway means that successful exploitation could provide attackers with persistent access to internal network resources, potentially enabling further reconnaissance and lateral movement throughout the compromised network infrastructure.
Security professionals should prioritize immediate mitigation efforts including firmware updates from Tenda, network segmentation to limit access to affected devices, and monitoring for suspicious network traffic patterns that might indicate exploitation attempts. The vulnerability's classification under CWE categories related to cryptographic failures and weak encryption implementations aligns with established security frameworks that emphasize the critical importance of proper cryptographic implementation in network devices. Organizations should also consider implementing network access controls, intrusion detection systems, and regular security assessments to identify and remediate similar vulnerabilities across their network infrastructure. The public disclosure of this exploit necessitates urgent action to prevent widespread compromise of affected Tenda CP6 devices in enterprise and residential network environments.