【Security Advisory】Information disclosure vulnerability in Sungrow iSolarCloud(SGSA-202606-0006)

Publish Date: 20261015

Advisory ID: SGSA-202606-0006

Product:  iSolarCloud

CVE ID: /

Severity: Low

Date: 2026-10-15

Description

An information disclosure vulnerability exists in Sungrow iSolarCloud. Encrypted credentials belonging to the currently logged‑in user are returned in the response payload of a specific post‑login API. Although these credentials are double‑encrypted, per security best practices for data minimization, APIs should not return such encrypted credential ciphertext in non‑essential scenarios.

Affected Versions

Vulnerable: The vulnerability was fully remediated on August 22, 2026; the system before this date carried this security exposure.

Not Affected: Following the remediation deployment on August 22, 2026, the system is no longer vulnerable to this flaw.

Vulnerability Rating

CVSS(4.0): 2.1/Low/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

The scoring is based on the CVSS 4.0 standard. The scoring criteria can be referenced at (https://www.first.org/cvss/calculator/4.0)

Mitigation and Remediation

Recommended Action: The iSolarCloud has been upgraded and repaired as of August 22, 2026, No action is required from customers.

Patch Release: N/A.

Temporary Fix: N/A.

Acknowledgments

This vulnerability was discovered and reported by Marlon Starkloff.

Contact information

For security issues regarding Sungrow products and solutions, please report to Sungrow psirt@sungrowpower.com.

Revision History

Statement

All software updates, patches, and documentation provided by Sungrow Power Supply Co., Ltd. are the proprietary work of Sungrow. These materials may only be used for product maintenance and security improvements. Any unauthorized modification, distribution, decompilation, or reverse engineering is strictly prohibited.

Sungrow makes no express or implied warranties regarding the information provided, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement. Sungrow shall not be liable for any direct, indirect, incidental, or consequential damages arising from the use of this document or associated software.

Sungrow reserves the right to update or modify this document at any time without prior notice. Customers are responsible for implementing security updates in a timely manner to protect their systems.