CVE-2025-15557 in Tapo H100 v1
Summary
by MITRE • 02/05/2026
An Improper Certificate Validation vulnerability in TP-Link Tapo H100 v1 and Tapo P100 v1 allows an on-path attacker on the same network segment to intercept and modify encrypted device-cloud communications. This may compromise the confidentiality and integrity of device-to-cloud communication, enabling manipulation of device data or operations.
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Analysis
by VulDB Data Team • 02/12/2026
The vulnerability CVE-2025-15557 represents a critical Improper Certificate Validation flaw affecting TP-Link Tapo H100 and P100 smart home devices. This weakness resides in the device's cryptographic implementation where proper certificate validation procedures are not adequately enforced during secure communications with cloud services. The vulnerability specifically impacts devices running firmware versions that fail to implement robust certificate chain validation mechanisms. Attackers exploiting this flaw can perform man-in-the-middle attacks by positioning themselves on the same network segment as the affected devices, effectively intercepting and modifying encrypted communications between the devices and TP-Link's cloud infrastructure. The technical nature of this vulnerability aligns with CWE-295 which specifically addresses improper certificate validation in security protocols. This weakness creates a significant risk as it undermines the fundamental security guarantees of encrypted communications, allowing attackers to compromise both confidentiality and integrity of data flows.
The operational impact of this vulnerability extends beyond simple data interception to encompass full manipulation capabilities over device operations. An attacker with network access can not only read sensitive communication data but also inject malicious commands or modify device configurations in real-time. This creates a persistent threat vector where attackers can potentially disable security features, alter device settings, or even gain unauthorized control over connected smart home ecosystems. The vulnerability affects devices that rely on secure cloud communication for remote access and management features, making it particularly dangerous for users who depend on cloud-based device control. The attack surface is significantly broadened as any device on the same network segment can potentially exploit this weakness, making it especially concerning in shared network environments such as homes, offices, or public spaces where network isolation is not guaranteed.
Mitigation strategies for CVE-2025-15557 should prioritize immediate firmware updates from TP-Link to address the certificate validation implementation flaws. Network administrators should implement additional security controls such as network segmentation and intrusion detection systems to monitor for suspicious communication patterns between devices and cloud services. The implementation of network access controls and firewall rules can help limit potential attack vectors by restricting unauthorized access to device communication ports. Organizations should also consider deploying network monitoring solutions that can detect anomalous certificate validation behaviors or unexpected communication patterns between devices and cloud infrastructure. According to ATT&CK framework tactic TA0011 (Command and Control), this vulnerability enables adversaries to establish persistent access and control over networked devices, while the technique T1071.004 (Application Layer Protocol: DNS) may be leveraged by attackers to establish covert communication channels. Device manufacturers and users should also consider implementing certificate pinning mechanisms where possible, and regularly audit device configurations to ensure proper certificate validation is enforced. The vulnerability demonstrates the critical importance of proper cryptographic implementation and highlights the need for robust security testing of IoT devices before deployment in production environments.