CISA Alert: Critical Flaws in Tigo Energy Solar Devices Allow Remote Takeover of Solar Systems

In a critical advisory issued by the Cybersecurity and Infrastructure Security Agency (CISA), newly discovered vulnerabilities in Tigo Energy’s Cloud Connect Advanced (CCA) device could allow attackers to gain full control of connected solar systems. These weaknesses—rated high to critical in severity—pose serious risks to energy production, data confidentiality, and operational safety.

“Successful exploitation of these vulnerabilities could allow attackers to gain unauthorized administrative access… interfere with safety mechanisms, execute arbitrary commands via command injection, cause service disruptions, expose sensitive data…” warns the advisory.

CVE-2025-7768 – Hard-Coded Credentials (CVSS 9.8 Critical)

One of the most concerning vulnerabilities is the use of hard-coded administrative credentials, which allow attackers to log in with system-level privileges.

“This vulnerability enables attackers to escalate privileges and take full control of the device, potentially modifying system settings, disrupting solar energy production, and interfering with safety mechanisms,” the advisory explains.

This issue allows unauthorized users to compromise the integrity of solar operations—a severe threat in sectors reliant on uninterrupted renewable energy.

CVE-2025-7769 – Command Injection in Mobile API (CVSS 8.8 High)

Another flaw exists in the /cgi-bin/mobile_api endpoint, specifically when the DEVICE_PING command is invoked. Due to improper neutralization of special characters, attackers can exploit this to inject and execute arbitrary system commands remotely.

“This enables attackers to execute arbitrary commands on the device… potentially leading to unauthorized access, service disruption, and data exposure,” the advisory notes.

This command injection vulnerability represents a powerful remote entry point for cybercriminals, especially when paired with the hard-coded credentials above.

CVE-2025-7770 – Predictable Session ID Generation (CVSS 8.8 High)

Session management within the CCA’s remote API is also flawed due to predictable pseudo-random number generation:

“The session IDs are generated using a predictable method based on the current timestamp… allowing attackers to recreate valid session IDs,” the advisory writes.

Combined with other weaknesses, this vulnerability could let adversaries bypass authentication and interact with sensitive device functions across a network of solar inverters.

The affected product includes

• Tigo Energy Cloud Connect Advanced (CCA)
  • Affected Versions: 4.0.1 and prior

According to CISA, Tigo Energy is aware of these vulnerabilities and is actively working on a fix to address them.

Users are encouraged to check Tigo Energy’s Help Center for specific mitigations. So far, no known public exploitation has been observed—but given the high CVSS scores and critical infrastructure implications, proactive action is essential.

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