# Sungrow Inverter Flaw Exposed Solar Plants to Unauthorized Access

*Published October 9, 2026*
*Source: [https://cybersecuritynews.com/sungrow-inverter-vulnerability/](https://cybersecuritynews.com/sungrow-inverter-vulnerability/)*

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## Article

A significant vulnerability in Sungrow inverters allowed attackers to bypass password authentication on the iSolarCloud platform, posing a threat to solar plant management across various regions including Europe, China, and Australia. This flaw, identified by researchers at Jakkaru, stemmed from a business logic error in the login process of the iSolarCloud management platform. It enabled unauthorized access to accounts using only a valid email address, bypassing the need for passwords. The platform, which manages solar inverters and battery systems, thus became susceptible to unauthorized control and potential manipulation of solar energy resources. Sungrow, a leading global manufacturer of solar inverters, responded swiftly by patching the vulnerability within a day of notification and commenced a detailed investigation to uncover the root cause and other potential weaknesses. The affected platform allows remote management of solar assets but used encrypted REST API requests and custom headers, which, while making testing challenging, did not prevent the exploit. The discovered flaw permitted intruders to access user accounts without triggering any alerts or notifications, raising concerns about unnoticed unauthorized access. Jakkaru noted that both customer and administrative accounts shared the same management environment, heightening the risk of privilege escalation. A compromised administrator account could result in extensive control over solar plants, including the ability to alter plant settings, manage inverter and battery operations, and even deploy custom firmware. The implications extend beyond data theft, as malicious firmware updates could disrupt device operations and coordinated changes in multiple systems could impact solar power generation. This incident reflects broader security challenges in the solar inverter sector, where previous studies have identified numerous vulnerabilities, including those in Sungrow systems. Security professionals advise against exposing inverter management interfaces to the public internet to prevent unauthorized access. Sungrow's swift response to this incident was commendable, with the company releasing a hotfix promptly. However, solar plant operators are urged to ensure their iSolarCloud accounts are updated, change passwords, enable multi-factor authentication, and review access permissions to mitigate future risks.