{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-76651", "assignerOrgId": "f23511db-6c3e-4e32-a477-6aa17d310630", "state": "PUBLISHED", "assignerShortName": "TPLink", "dateReserved": "2026-08-19T15:49:30.548Z", "datePublished": "2026-08-28T20:19:09.293Z", "dateUpdated": "2026-08-28T20:19:09.293Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f23511db-6c3e-4e32-a477-6aa17d310630", "shortName": "TPLink", "dateUpdated": "2026-08-28T20:19:09.293Z"}, "title": "Pre-Authentication Multipart Boundary Buffer Overflow in HTTP Service in TP-Link TL-WR841N", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-120", "description": "CWE-120 Buffer Copy without Checking Size of Input", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-100", "descriptions": [{"lang": "en", "value": "CAPEC-100 Overflow Buffers"}]}], "affected": [{"vendor": "TP-Link System Inc.", "product": "TL-WR841N v14", "versions": [{"status": "affected", "version": "0", "lessThan": "TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478", "versionType": "custom"}, {"status": "affected", "version": "0", "lessThan": "TL-WR841N(EU)_V14_4.19 Build 260821 Rel.56588", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "A buffer\noverflow vulnerability exists in the embedded HTTP service\u00a0in TL-WR841N v14\u00a0when processing\nmultipart/form-data requests. Insufficient validation of an attacker-controlled\nboundary parameter may allow a remote unauthenticated attacker to submit a\ncrafted request that corrupts memory by overwriting data beyond the bounds of\nan internal buffer.\n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation may result in modification or corruption of process memory,\npotentially leading to undefined application behavior. Arbitrary code\nexecution, information disclosure, and denial-of-service conditions have not\nbeen demonstrated.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p><span>A buffer\noverflow vulnerability exists in the embedded HTTP service&nbsp;</span><span>in TL-WR841N v14</span><span>&nbsp;</span><span>when processing\nmultipart/form-data requests. Insufficient validation of an attacker-controlled\nboundary parameter may allow a remote unauthenticated attacker to submit a\ncrafted request that corrupts memory by overwriting data beyond the bounds of\nan internal buffer.</span></p><div><p>\n\n</p><p>Successful\nexploitation may result in modification or corruption of process memory,\npotentially leading to undefined application behavior. Arbitrary code\nexecution, information disclosure, and denial-of-service conditions have not\nbeen demonstrated.</p></div>"}]}], "references": [{"url": "https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware", "tags": ["patch"]}, {"url": "https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware", "tags": ["patch"]}, {"url": "https://www.tp-link.com/us/support/faq/5270/", "tags": ["vendor-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 5.3, "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}}], "credits": [{"lang": "en", "value": "Jincheng Wang (@winmt) from Nanjing University of Posts and Telecommunications", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "TL-WR841N v14", "vendor": "TP-Link System Inc.", "versions": [{"lessThan": "TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478", "status": "affected", "version": "0", "versionType": "custom"}, {"lessThan": "TL-WR841N(EU)_V14_4.19 Build 260821 Rel.56588", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "f23511db-6c3e-4e32-a477-6aa17d310630"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A buffer\noverflow vulnerability exists in the embedded HTTP service\u00a0in TL-WR841N v14\u00a0when processing\nmultipart/form-data requests. Insufficient validation of an attacker-controlled\nboundary parameter may allow a remote unauthenticated attacker to submit a\ncrafted request that corrupts memory by overwriting data beyond the bounds of\nan internal buffer.\n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation may result in modification or corruption of process memory,\npotentially leading to undefined application behavior. Arbitrary code\nexecution, information disclosure, and denial-of-service conditions have not\nbeen demonstrated."}], "id": "CVE-2026-76651", "lastModified": "2026-08-28T22:16:53.503", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "ADJACENT", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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:A/AC:L/AT:N/PR:N/UI:N/VC:N/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": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "f23511db-6c3e-4e32-a477-6aa17d310630", "type": "Secondary"}]}, "published": "2026-08-28T22:16:53.503", "references": [{"source": "f23511db-6c3e-4e32-a477-6aa17d310630", "url": "https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware"}, {"source": "f23511db-6c3e-4e32-a477-6aa17d310630", "url": "https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware"}, {"source": "f23511db-6c3e-4e32-a477-6aa17d310630", "url": "https://www.tp-link.com/us/support/faq/5270/"}], "sourceIdentifier": "f23511db-6c3e-4e32-a477-6aa17d310630", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-120"}], "source": "f23511db-6c3e-4e32-a477-6aa17d310630", "type": "Secondary"}]}

{}

{"created": "2026-08-29T00:30:17.155621+00:00", "updated": "2026-08-29T00:30:17.155627+00:00", "vendors": []}