CVE-2025-7770 Predictable Seed in Pseudo-Random Number Generator (PRNG) in Tigo Energy Cloud Connect Advanced
Attackers can predict session IDs to bypass authentication and access sensitive functions on Tigo Energy solar optimization devices.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-7770?
CVE-2025-7770 is a high-severity vulnerability in Tigo Energy Cloud Connect Advanced, published on 6 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Tigo Energy's CCA device is vulnerable to insecure session ID generation in their remote API. The session IDs are generated using a predictable method based on the current timestamp, allowing attackers to recreate valid session IDs. When combined with the ability to circumvent session ID requirements for certain commands, this enables unauthorized access to sensitive device functions on connected solar optimization systems.
Weakness: CWE-337
Which versions are affected by CVE-2025-7770?
How do I fix CVE-2025-7770?
No fix has been published for CVE-2025-7770 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-7770 being exploited?
There is no known exploitation of CVE-2025-7770 in the wild and no public exploit code.
Sources
Also known as GHSA-gjpw-wr3x-q236.