{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-7866", "assignerOrgId": "3f572a00-62e2-4423-959a-7ea25eff1638", "state": "PUBLISHED", "assignerShortName": "RTI", "dateReserved": "2026-05-05T13:54:48.225Z", "datePublished": "2026-09-22T17:50:13.857Z", "dateUpdated": "2026-09-22T19:05:51.079Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "modules": ["Core Libraries"], "product": "Connext Professional", "packageName": "connext_professional", "packageURL": "pkg:generic/connext_professional", "vendor": "RTI", "versions": [{"lessThan": "7.7.0.1", "status": "affected", "version": "7.4.0", "versionType": "custom"}, {"lessThan": "7.3.1.6", "status": "affected", "version": "7.0.0", "versionType": "custom"}, {"lessThan": "6.1.*", "status": "affected", "version": "6.1.0", "versionType": "custom"}, {"lessThan": "6.0.*", "status": "affected", "version": "6.0.0", "versionType": "custom"}, {"lessThan": "5.3.*", "status": "affected", "version": "5.3.0", "versionType": "custom"}, {"lessThan": "5.2.*", "status": "affected", "version": "5.2.0", "versionType": "custom"}, {"lessThan": "5.1.*", "status": "affected", "version": "4.3x", "versionType": "custom"}]}], "datePublic": "2026-09-15T17:46:58.821Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers.<p>This issue affects Connext Professional: from 7.4.0 before 7.7.0.1, from 7.0.0 before 7.3.1.6, from 6.1.0 before 6.1.*, from 6.0.0 before 6.0.*, from 5.3.0 before 5.3.*, from 5.2.0 before 5.2.*, from 4.3x before 5.1.*.</p>"}], "value": "Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers. This issue affects Connext Professional: from 7.4.0 before 7.7.0.1, from 7.0.0 before 7.3.1.6, from 6.1.0 before 6.1.*, from 6.0.0 before 6.0.*, from 5.3.0 before 5.3.*, from 5.2.0 before 5.2.*, from 4.3x before 5.1.*."}], "impacts": [{"capecId": "CAPEC-100", "descriptions": [{"lang": "en", "value": "CAPEC-100 Overflow Buffers"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 10, "baseSeverity": "CRITICAL", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}, {"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "baseScore": 9.3, "baseSeverity": "CRITICAL", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "Security Extensions Enabled"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-121", "description": "CWE-121 Stack-based Buffer Overflow", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "3f572a00-62e2-4423-959a-7ea25eff1638", "shortName": "RTI", "dateUpdated": "2026-09-22T17:50:13.857Z"}, "references": [{"url": "https://www.rti.com/vulnerabilities/#cve-2026-7866"}], "source": {"discovery": "UNKNOWN"}, "title": "Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers.", "x_generator": {"engine": "RTI Lubna 1.18.7"}, "cpeApplicability": [{"nodes": [{"operator": "OR", "negated": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.4.0", "versionEndExcluding": "7.7.0.1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0.0", "versionEndExcluding": "7.3.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.0", "versionEndExcluding": "6.1.*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0.0", "versionEndExcluding": "6.0.*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3.0", "versionEndExcluding": "5.3.*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2.0", "versionEndExcluding": "5.2.*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3x", "versionEndExcluding": "5.1.*"}]}]}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-22T19:05:47.009185Z", "id": "CVE-2026-7866", "options": [{"Exploitation": "none"}, {"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": "2026-09-22T19:05:51.079Z"}}]}}