How severe is CVE-2025-7770?

CVE-2025-7770 has a CVSS 4.0 base score of 8.7, rated high severity.

Is CVE-2025-7770 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-7770?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-7770 have an EU (EUVD) identifier?

Yes. CVE-2025-7770 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23880.

When was CVE-2025-7770 published?

CVE-2025-7770 was published on 2025-08-06 and last updated on 2026-06-17.

CVE-2025-7770

CVE-2025-7770 is a high-severity vulnerability with a CVSS 4.0 base score of 8.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-337.

Key facts

Severity: High (CVSS 4.0 base score 8.7)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-23880
Weakness: CWE-337
Published: 2025-08-06
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-7770?: 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.
How severe is CVE-2025-7770?: CVE-2025-7770 has a CVSS 4.0 base score of 8.7, rated high severity.
Is CVE-2025-7770 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-7770?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-7770 have an EU (EUVD) identifier?: Yes. CVE-2025-7770 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23880.
When was CVE-2025-7770 published?: CVE-2025-7770 was published on 2025-08-06 and last updated on 2026-06-17.

References

https://www.cisa.gov/news-events/ics-advisories/icsa-25-217-02

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