{ "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": "2026-09-23T03:56:00.130Z" }, "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.

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.*.

" } ], "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": "2026-09-22T00:00:00+00:00", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-7866" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-23T03:56:00.130Z" } } ] } }