CVE-2026-21666

{"id": "CVE-2026-21666", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "support@hackerone.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.9, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 3.1}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "published": "2026-03-12T15:16:13.007", "references": [{"url": "https://www.veeam.com/kb4830", "tags": ["Vendor Advisory"], "source": "support@hackerone.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-284"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server."}, {"lang": "es", "value": "Una vulnerabilidad que permite a un usuario de dominio autenticado realizar ejecuci\u00f3n remota de c\u00f3digo (RCE) en el servidor de copia de seguridad."}], "lastModified": "2026-03-31T01:02:57.667", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:veeam:veeam_backup_\\&_replication:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7C1376E5-9691-4087-B594-B03F061BE3C8", "versionEndExcluding": "12.3.2.4465", "versionStartIncluding": "12.0.0.1402"}], "operator": "OR"}]}], "sourceIdentifier": "support@hackerone.com"}