{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-15645", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-05-19T21:28:04.419Z", "datePublished": "2026-05-19T21:41:50.473Z", "dateUpdated": "2026-05-19T21:41:50.473Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-05-19T21:41:50.473Z"}, "title": "Ledger Nano X, Flex, Stax MCU Firmware Update Denial of Service", "datePublic": "2025-05-19T22:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-1284", "description": "CWE-1284 Improper Validation of Specified Quantity in Input", "type": "CWE"}]}], "affected": [{"vendor": "Ledger", "product": "Ledger Nano X", "versions": [{"status": "affected", "version": "0", "lessThan": "2.4.2", "versionType": "custom"}], "defaultStatus": "unaffected"}, {"vendor": "Ledger", "product": "Ledger Flex", "versions": [{"status": "affected", "version": "0", "lessThan": "1.2.2", "versionType": "custom"}], "defaultStatus": "unaffected"}, {"vendor": "Ledger", "product": "Ledger Stax", "versions": [{"status": "affected", "version": "0", "lessThan": "1.6.2", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Ledger Nano X, Flex, and Stax devices contain a denial of service vulnerability in the MCU firmware update process due to missing validation of the reset_handler parameter during firmware flashing. An attacker can provide a crafted reset_handler address pointing to invalid memory or attacker-controlled code to cause the device to enter an unrecoverable fault state during boot, resulting in permanent loss of operability.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Ledger Nano X, Flex, and Stax devices contain a denial of service vulnerability in the MCU firmware update process due to missing validation of the reset_handler parameter during firmware flashing. An attacker can provide a crafted reset_handler address pointing to invalid memory or attacker-controlled code to cause the device to enter an unrecoverable fault state during boot, resulting in permanent loss of operability.</p>"}]}], "references": [{"url": "https://www.ledger.com/security-bulletin", "name": "Ledger Security Bulletin 021", "tags": ["vendor-advisory"]}, {"url": "https://www.vulncheck.com/advisories/ledger-nano-x-flex-stax-mcu-firmware-update-denial-of-service", "tags": ["third-party-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "PHYSICAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "MEDIUM", "baseScore": 4.6, "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "PHYSICAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 5.1, "vectorString": "CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}}], "credits": [{"lang": "en", "value": "Guanxing Wen", "type": "finder"}, {"lang": "en", "value": "VulnCheck", "type": "coordinator"}], "source": {"discovery": "EXTERNAL"}}}}

{}

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{}

{"created": "2026-05-20T00:00:16.291401+00:00", "updated": "2026-05-20T00:00:16.291415+00:00", "vendors": []}