Besen BS20 EV Charging Station OTA Update Installation improper authorization_CVE-2026-9397

{
    "lastseen": "",
    "description": "A weakness has been identified in Besen BS20 EV Charging Station up to 20260426. Affected by this issue is some unknown functionality of the component OTA Update Installation Handler. This manipulation causes improper authorization. The attack is possible to be carried out remotely. A high degree of complexity is needed for the attack. The exploitation is known to be difficult. The original disclosure mentions, that \"[t]hese vulnerabilities have been reported to Besen and we have received their acknowlegement that they are reviewing this as of April 2026.\"",
    "published": "2026-05-24T20:30:10.350Z",
    "modified": "2026-05-24T20:30:10.350Z",
    "type": "cve",
    "title": "Besen BS20 EV Charging Station OTA Update Installation improper authorization",
    "source": "VulDB",
    "references": "https://vuldb.com/vuln/365378\nhttps://vuldb.com/vuln/365378/cti\nhttps://vuldb.com/submit/813576\nhttps://github.com/carfeii/besen#finding-4-unauthorized-firmware-installation-via-spoofed-ota-updates",
    "id": "CVE-2026-9397",
    "bulletinFamily": "",
    "cwe": [
        "CWE-285",
        "CWE-266"
    ],
    "cvelist": null,
    "sourceData": "Besen BS20 EV Charging Station 20260426",
    "sourceHref": "",
    "cvss": {
        "score": 9.2,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P",
        "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": "BS20 EV Charging Station",
    "version": "20260426",
    "vendor": "Besen",
    "ai_description": "Improper authorization vulnerability in Besen BS20 EV Charging Station's OTA Update Installation Handler, allowing remote attacks with high complexity and difficult exploitation.",
    "ai_severity": "Critical",
    "ai_vendor": "Besen",
    "ai_product": "BS20 EV Charging Station",
    "ai_version": "20260426",
    "ai_score": 9.2
}