CVE-2024-28756 identifies a certificate verification vulnerability in the SolarEdge mySolarEdge Android application versions before 2.20.1. The vulnerability stems from the app's failure to properly validate SSL/TLS certificates during communication with its backend servers. This improper validation allows a man-in-the-middle (MitM) attacker positioned on the same network or capable of intercepting traffic to decrypt, read, and modify all data exchanged between the app and the server. The vulnerability does not require user interaction or authentication, but does require the attacker to have network access, such as on a compromised Wi-Fi network or through other network interception techniques. The CVSS 3.1 score of 5.9 (medium) reflects the high confidentiality impact due to exposure of sensitive data, a low integrity impact since the attacker can alter data but not fully control the app, and no impact on availability. The vulnerability is categorized under CWE-125 (Out-of-bounds Read), indicating a flaw in how the app processes certificate data. No public exploits have been reported yet, but the risk remains significant given the potential to compromise sensitive operational data related to solar energy systems. The lack of patch links suggests users should monitor SolarEdge advisories for updates and apply version 2.20.1 or later once available.

The primary impact of this vulnerability is the compromise of confidentiality and partial integrity of data transmitted between the mySolarEdge Android app and its servers. Attackers exploiting this flaw can intercept sensitive information such as user credentials, system status, and energy production data. They can also modify data in transit, potentially misleading users or operators about system performance or causing erroneous operational decisions. While availability is not affected, the breach of confidentiality can lead to privacy violations and facilitate further attacks against the infrastructure. Organizations relying on SolarEdge for solar energy monitoring, including residential, commercial, and utility-scale deployments, may face operational risks and reputational damage if attackers exploit this vulnerability. The risk is heightened in environments where users connect via untrusted or public networks. Given the increasing adoption of solar energy solutions worldwide, the scope of affected systems is broad, especially in countries with high SolarEdge market penetration.

To mitigate this vulnerability, organizations and users should immediately update the mySolarEdge Android application to version 2.20.1 or later once it is released by SolarEdge, as this version addresses the certificate verification flaw. Until the patch is applied, users should avoid connecting the app over untrusted or public Wi-Fi networks to reduce the risk of MitM attacks. Employing VPNs can provide an additional layer of encryption and protection against network interception. Network administrators should monitor network traffic for unusual patterns indicative of MitM activity. Additionally, organizations should consider implementing network segmentation and strong endpoint security controls on devices running the app. SolarEdge should be contacted for official guidance and confirmation of patch availability. Finally, educating users about the risks of using the app on insecure networks and encouraging prompt updates is critical.