CVE-2021-25829

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:onlyoffice:document_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "076102C8-B582-4304-AD4E-0CDAE6DF191A", "versionEndIncluding": "5.6.3", "versionStartIncluding": "4.0.0-9", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An improper binary stream data handling issue was found in the [core] module of ONLYOFFICE DocumentServer v4.0.0-9-v5.6.3. Using this bug, an attacker is able to produce a denial of service attack that can eventually shut down the target server."}, {"lang": "es", "value": "Se encontr\u00f3 un problema de manejo inapropiado de datos de flujo binario en el m\u00f3dulo [core] de ONLYOFFICE DocumentServer versiones v4.0.0-9-v5.6.3. Al usar este bug, un atacante es capaz de producir un ataque de denegaci\u00f3n de servicio que eventualmente puede apagar el servidor de destino"}], "id": "CVE-2021-25829", "lastModified": "2026-06-17T03:42:29.107", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-03-01T16:15:14.150", "references": [{"source": "cve@mitre.org", "tags": ["Product"], "url": "https://github.com/ONLYOFFICE/DocumentServer"}, {"source": "cve@mitre.org", "tags": ["Product", "Vendor Advisory"], "url": "https://github.com/ONLYOFFICE/core"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://github.com/ONLYOFFICE/core/blob/c1e4a2ce33bdcfab29d670f5fdb10fc63cf5fd6a/ASCOfficePPTXFile/PPTXFormat/Comments.h#L299"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://github.com/ONLYOFFICE/core/blob/c1e4a2ce33bdcfab29d670f5fdb10fc63cf5fd6a/ASCOfficePPTXFile/PPTXFormat/Core.h#L161"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": 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