CVE-2025-34520

{"id": "CVE-2025-34520", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-34520", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2025-08-29T03:55:21.831619Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 7.7, "Automatable": "NOT_DEFINED", "attackVector": "ADJACENT", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "disclosure@vulncheck.com", "affectedData": [{"vendor": "Arcserve", "modules": ["\"Authentication subsystem"], "product": "Unified Data Protection (UDP)", "versions": [{"status": "unaffected", "version": "10.2"}, {"status": "affected", "version": "8.0", "versionType": "custom", "lessThanOrEqual": "10.1"}, {"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "7.*"}], "defaultStatus": "unaffected"}]}], "published": "2025-08-27T22:15:57.703", "references": [{"url": "https://support.arcserve.com/s/article/Important-Security-Bulletin-Must-read-for-all-Arcserve-UDP-customers-on-all-versions", "tags": ["Vendor Advisory"], "source": "disclosure@vulncheck.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-288"}]}], "descriptions": [{"lang": "en", "value": "An authentication bypass vulnerability in Arcserve Unified Data Protection (UDP) allows unauthenticated attackers to gain unauthorized access to protected functionality or user accounts. By manipulating specific request parameters or exploiting a logic flaw, an attacker can bypass login mechanisms without valid credentials and access administrator-level features. This vulnerability affects all UDP versions prior to 10.2. UDP 10.2 includes the necessary patches and requires no action. Versions 8.0 through 10.1 are supported and require either patch application or upgrade to 10.2. Versions 7.x and earlier are unsupported or out of maintenance and must be upgraded to 10.2 to remediate the issue."}, {"lang": "es", "value": "Una vulnerabilidad de omisi\u00f3n de autenticaci\u00f3n en Arcserve Unified Data Protection (UDP) permite a atacantes no autenticados obtener acceso no autorizado a funcionalidad protegida o cuentas de usuario. Al manipular par\u00e1metros de solicitud espec\u00edficos o explotar una falla l\u00f3gica, un atacante puede omitir los mecanismos de inicio de sesi\u00f3n sin credenciales v\u00e1lidas y acceder a caracter\u00edsticas de nivel de administrador. Esta vulnerabilidad afecta a todas las versiones de UDP anteriores a la 10.2. UDP 10.2 incluye los parches necesarios y no requiere ninguna acci\u00f3n. Las versiones 8.0 a 10.1 son compatibles y requieren la aplicaci\u00f3n de parches o la actualizaci\u00f3n a la 10.2. Las versiones 7.x y anteriores no son compatibles o est\u00e1n fuera de mantenimiento y deben actualizarse a la 10.2 para solucionar el problema."}], "lastModified": "2026-09-26T00:10:00.127", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:arcserve:udp:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "53D70153-E6B7-4D27-83AA-77817EBBBC3E", "versionEndExcluding": "7.0"}, {"criteria": "cpe:2.3:a:arcserve:udp:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7644D867-3950-4EBF-9CBE-644458C26801", "versionEndExcluding": "10.2", "versionStartIncluding": "8.0"}, {"criteria": "cpe:2.3:a:arcserve:udp:7.0:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1CAB17ED-9FBC-475F-8206-3BC8E672C719"}, {"criteria": "cpe:2.3:a:arcserve:udp:7.0:update_1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8672F05B-B0FC-4A81-8D5B-2A7DE8C6D92D"}, {"criteria": "cpe:2.3:a:arcserve:udp:7.0:update_2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1379C0DE-8BB0-47FF-AE56-6E54F125E5A0"}], "operator": "OR"}]}], "sourceIdentifier": "disclosure@vulncheck.com"}