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vuln-cve/data/2026/91xxx/CVE-2026-91958.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-91958",
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"state": "PUBLISHED",
"assignerShortName": "VulnCheck",
"dateReserved": "2026-09-15T11:07:34.399Z",
"datePublished": "2026-09-15T15:18:13.294Z",
"dateUpdated": "2026-09-15T15:59:22.785Z"
},
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"shortName": "VulnCheck",
"dateUpdated": "2026-09-15T15:18:13.294Z"
},
"datePublic": "2026-08-31T00:00:00.000Z",
"title": "FreeRDP 3.11.0 through 3.30.0 Heap Buffer Overflow via Monitor Index",
"descriptions": [
{
"lang": "en",
"value": "FreeRDP versions before 3.31.0 fail to validate MonitorIds array values when parsing RDP connection files, allowing unbounded array indexing in xf_detect_monitors. Attackers can craft a malicious RDP file with an out-of-range selectedmonitors value to trigger out-of-bounds heap read and write operations when opened in xfreerdp."
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "Out-of-bounds Read",
"cweId": "CWE-125",
"type": "CWE"
}
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}
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"affected": [
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"vendor": "FreeRDP",
"product": "FreeRDP",
"defaultStatus": "unaffected",
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"versionType": "semver",
"version": "3.11.0",
"lessThan": "3.31.0",
"status": "affected"
},
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"versionType": "semver",
"version": "3.31.0",
"status": "unaffected"
}
]
}
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"cpeApplicability": [
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"operator": "OR",
"negate": false,
"cpeMatch": [
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"vulnerable": true,
"criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "3.31.0"
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"attackVector": "LOCAL",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "PASSIVE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "LOW",
"vulnAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 6.9,
"baseSeverity": "MEDIUM"
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H",
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"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"availabilityImpact": "HIGH",
"baseScore": 6.6,
"baseSeverity": "MEDIUM"
}
}
],
"references": [
{
"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-23pf-q83q-x45r",
"tags": [
"vendor-advisory"
],
"name": "GitHub Security Advisory (GHSA-23pf-q83q-x45r)"
},
{
"name": "VulnCheck Advisory: FreeRDP 3.11.0 through 3.30.0 Heap Buffer Overflow via Monitor Index",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/freerdp-3.11.0-through-3.30.0-heap-buffer-overflow-via-monitor-index"
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"credits": [
{
"lang": "en",
"value": "arpitjain099",
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"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-23pf-q83q-x45r",
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"content": {
"timestamp": "2026-09-15T15:59:07.176927Z",
"id": "CVE-2026-91958",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-09-15T15:59:22.785Z"
}
}
]
}
}