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vuln-cve/data/2026/55xxx/CVE-2026-55827.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-55827",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-06-17T16:29:38.864Z",
"datePublished": "2026-07-10T19:47:03.498Z",
"dateUpdated": "2026-07-15T03:58:59.199Z"
},
"containers": {
"cna": {
"title": "FreeRDP: Heap out-of-bounds write in RemoteFX (RFX) Cache Bitmap V3 decode",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-131",
"lang": "en",
"description": "CWE-131: Incorrect Calculation of Buffer Size",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-787",
"lang": "en",
"description": "CWE-787: Out-of-bounds Write",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c495-h83v-3prp",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c495-h83v-3prp"
},
{
"name": "https://github.com/FreeRDP/FreeRDP/pull/12899",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/FreeRDP/FreeRDP/pull/12899"
},
{
"name": "https://github.com/FreeRDP/FreeRDP/commit/e58adf922ea4c0d5495e59a1fe488d70092e0e3e",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/FreeRDP/FreeRDP/commit/e58adf922ea4c0d5495e59a1fe488d70092e0e3e"
},
{
"name": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.1"
}
],
"affected": [
{
"vendor": "FreeRDP",
"product": "FreeRDP",
"versions": [
{
"version": "< 3.27.1",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-07-10T19:47:03.498Z"
},
"descriptions": [
{
"lang": "en",
"value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.1, FreeRDP clients launched with the non-default /cache:codec:rfx option pass desktop stride and height to RemoteFX decoding for Cache Bitmap V3 data while allocating bitmap->data only for the smaller DstWidth and DstHeight in gdi_Bitmap_Decompress, allowing a malicious RDP server to trigger a heap out-of-bounds write with attacker-controlled offset and content. This issue is fixed in version 3.27.1."
}
],
"source": {
"advisory": "GHSA-c495-h83v-3prp",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c495-h83v-3prp",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-07-14T00:00:00+00:00",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3",
"id": "CVE-2026-55827"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-07-15T03:58:59.199Z"
}
}
]
}
}