CVE-2026-3100

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageName": "FTP Backup", "platforms": ["Linux", "x86", "ARM", "64 bit"], "product": "ADM", "vendor": "ASUSTOR", "versions": [{"lessThanOrEqual": "4.3.3.ROF1", "status": "affected", "version": "4.1.0", "versionType": "custom"}, {"lessThanOrEqual": "5.1.2.RE51", "status": "affected", "version": "5.0.0", "versionType": "custom"}]}], "source": "security@asustor.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:asustor:data_master:*:*:*:*:*:*:*:*", "matchCriteriaId": "662E4EA5-0C53-4669-947E-705E5E076B10", "versionEndIncluding": "4.3.3.rof1", "versionStartIncluding": "4.1.0.rhu2", "vulnerable": true}, {"criteria": "cpe:2.3:o:asustor:data_master:*:*:*:*:*:*:*:*", "matchCriteriaId": "47B926F1-1D8F-4105-A533-45E0B4178C59", "versionEndExcluding": "5.1.2.reo1", "versionStartIncluding": "5.0.0.ra82", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The FTP Backup on the ADM will not properly strictly enforce TLS certificate verification while connecting to an FTP server using FTPES/FTPS. An improper validated TLS/SSL certificates allows a remote attacker can intercept network traffic to perform a Man-in-the-Middle (MitM) attack, which may intercept, modify, or obtain sensitive information such as authentication credentials and backup data.\nAffected products and versions include: from ADM 4.1.0 through ADM 4.3.3.ROF1 as well as from ADM 5.0.0 through ADM 5.1.2.RE51."}, {"lang": "es", "value": "La copia de seguridad FTP en el ADM no aplicar\u00e1 de forma adecuada y estricta la verificaci\u00f3n de certificados TLS al conectarse a un servidor FTP utilizando FTPES/FTPS. Unos certificados TLS/SSL validados incorrectamente permiten que un atacante remoto intercepte el tr\u00e1fico de red para realizar un ataque Man-in-the-Middle (MitM), que puede interceptar, modificar u obtener informaci\u00f3n sensible como credenciales de autenticaci\u00f3n y datos de copia de seguridad.\nLos productos y versiones afectados incluyen: desde ADM 4.1.0 hasta ADM 4.3.3.ROF1, as\u00ed como desde ADM 5.0.0 hasta ADM 5.1.2.RE51."}], "id": "CVE-2026-3100", "lastModified": "2026-06-17T10:43:02.483", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 4.2, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.3, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security@asustor.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3100", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-25T17:46:30.911041Z", "version": "2.0.3"}}]}, "published": "2026-02-25T06:16:26.180", "references": [{"source": "security@asustor.com", "tags": ["Vendor Advisory"], "url": "https://www.asustor.com/security/security_advisory_detail?id=53"}], "sourceIdentifier": "security@asustor.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}], "source": "security@asustor.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": ["linux", "x86", "arm", "64_bit"], "status": "affected", "versions": {"scheme": "generic", "value": "[4.1.0,4.3.3.ROF1]"}}, {"platform": ["linux", "x86", "arm", "64_bit"], "status": "affected", "versions": {"scheme": "generic", "value": "[5.0.0,5.1.2.RE51]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "ADM", "source": "cna", "vendor": "ASUSTOR"}, "product": "adm", "vendor": "asustor"}], "analysis": {"en": {"generated_at": "2026-04-17T15:23:31.695523+00:00", "value": {"mitigation_remediation": ["Update the ADM firmware to a version that includes the certificate validation fix, as detailed in the ASUSTOR security advisory.", "Disable FTP backup to external servers that do not support strict TLS certificate verification or configure the backup destination to use a trusted, signed certificate.", "Monitor network traffic for suspicious FTP connections and set up firewall rules to block untrusted external FTP servers from connecting to the ADM appliance."], "summary": {"action": "Immediate Update", "impact": "Man\u2011in\u2011the\u2011Middle via bypassed TLS certificate validation"}, "threat_synthesis": {"affected_systems": "The issue affects devices running ASUSTOR ADM firmware versions from 4.1.0 through 4.3.3.ROF1 and 5.0.0 through 5.1.2.RE51.", "description_and_impact": "An improper validation of TLS/SSL certificates in the FTP Backup feature of the ADM allows an attacker to perform a Man\u2011in\u2011the\u2011Middle attack while the system is backing up to an FTPES/FTPS server. The flaw permits interception, alteration, or retrieval of sensitive data such as authentication credentials and backup contents without the user\u2019s knowledge. This weakness corresponds to CWE\u2011295, which focuses on lack of proper authentication of certificates, leading to potential data compromise.", "risk_and_exploitability": "The CVSS score of 8.3 indicates high severity; the EPSS score of less than 1% suggests a very low current exploitation probability, and the vulnerability is not listed in CISA\u2019s KEV catalog. An attacker only needs the ability to establish an FTPES/FTPS connection to the ADM; no local privileges or additional credentials are required. Given the high severity, the potential impact on confidentiality and integrity of backup data is significant if the flaw is exploited."}}}}, "created": "2026-02-25T11:34:31.016760+00:00", "updated": "2026-04-17T15:30:06.025879+00:00", "vendors": ["asustor", "asustor$PRODUCT$adm"]}