{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47854", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-01-14T17:11:19.903Z", "datePublished": "2026-01-21T17:27:38.228Z", "dateUpdated": "2026-07-28T01:47:25.803Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-07-28T01:47:25.803Z" }, "datePublic": "2021-03-24T00:00:00.000Z", "title": "DD-WRT 45723 - UPNP Buffer Overflow", "descriptions": [ { "lang": "en", "value": "DD-WRT version 45723 contains a buffer overflow vulnerability in the UPNP network discovery service that allows remote attackers to potentially execute arbitrary code. Attackers can send crafted M-SEARCH packets with oversized UUID payloads to trigger buffer overflow conditions on the target device." } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')", "cweId": "CWE-120", "type": "CWE" } ] } ], "affected": [ { "vendor": "embeDD GmbH", "product": "DD-WRT", "versions": [ { "version": "45723", "status": "affected" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:dd-wrt:dd-wrt:45723:*:*:*:*:*:*:*" } ] } ] } ], "metrics": [ { "cvssV4_0": { "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 8.7, "baseSeverity": "HIGH", "exploitMaturity": "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:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED" }, "format": "CVSS" }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "format": "CVSS" } ], "references": [ { "url": "https://www.exploit-db.com/exploits/49730", "name": "ExploitDB-49730", "tags": [ "exploit" ] }, { "url": "https://dd-wrt.com/", "name": "DD-WRT Official Vendor Homepage", "tags": [ "product" ] }, { "url": "https://download1.dd-wrt.com/dd-wrtv2/downloads/betas/2021/", "name": "DD-WRT Software Download Repository", "tags": [ "product" ] }, { "url": "https://ssd-disclosure.com/ssd-advisory-dd-wrt-upnp-buffer-overflow/", "name": "SSD Security Advisory for DD-WRT UPNP Buffer Overflow", "tags": [ "technical-description" ] }, { "name": "VulnCheck Advisory: DD-WRT 45723 - UPNP Buffer Overflow", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/dd-wrt-upnp-buffer-overflow" } ], "credits": [ { "lang": "en", "value": "Selim Enes 'Enesdex' Karaduman", "type": "finder" } ], "x_generator": { "engine": "vulncheck" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-01-22T15:11:46.923237Z", "id": "CVE-2021-47854", "options": [ { "Exploitation": "poc" }, { "Automatable": "yes" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-22T15:11:53.533Z" } } ] } }