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

{
    "lastseen": "",
    "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.",
    "published": "2025-08-06T20:45:06.780Z",
    "modified": "2025-08-06T20:45:06.780Z",
    "type": "cve",
    "title": "Predictable Seed in Pseudo-Random Number Generator (PRNG) in Tigo Energy Cloud Connect Advanced",
    "source": "icscert",
    "references": "https://www.cisa.gov/news-events/ics-advisories/icsa-25-217-02",
    "id": "CVE-2025-7770",
    "bulletinFamily": "",
    "cwe": [
        "CWE-337"
    ],
    "cvelist": null,
    "sourceData": "Tigo Energy Cloud Connect Advanced 0",
    "sourceHref": "",
    "cvss": {
        "score": 8.7,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Cloud Connect Advanced",
    "version": "0",
    "vendor": "Tigo Energy",
    "ai_description": "The Tigo Energy Cloud Connect Advanced device has a vulnerability where session IDs are predictable, based on the current timestamp. This allows attackers to generate valid session IDs and potentially gain unauthorized access to sensitive functions on connected solar systems.",
    "ai_severity": "High",
    "ai_vendor": "Tigo Energy",
    "ai_product": "Cloud Connect Advanced",
    "ai_version": "0",
    "ai_score": 0
}