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CVE-2025-7770

Predictable Seed in Pseudo-Random Number Generator (PRNG) in Tigo Energy Cloud Connect Advanced

HIGH
8.7
CVSS Score
Published: August 6, 2025 at 08:45 PM UTC
Updated: June 17, 2026 at 10:05 AM UTC
1 product affected across 1 vendorCloud Connect Advanced

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Severity
HIGH8.7
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

US Government Resource
Source: [email protected]
https://www.cisa.gov/news-events/ics-advisories/icsa-25-217-02

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHicscert
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-337

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