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vuln-cve/data/2026/40xxx/CVE-2026-40541.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-40541",
"assignerOrgId": "db201096-a0cc-46c7-9a55-61d9e221bf01",
"state": "PUBLISHED",
"assignerShortName": "synology",
"dateReserved": "2026-04-14T01:01:14.607Z",
"datePublished": "2026-08-28T07:07:24.049Z",
"dateUpdated": "2026-08-28T11:44:42.311Z"
},
"containers": {
"cna": {
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
"cweId": "CWE-79",
"type": "CWE"
}
]
}
],
"affected": [
{
"vendor": "Synology",
"product": "Synology Chat Server",
"versions": [
{
"version": "*",
"status": "affected",
"lessThan": "2.4.5-22148",
"versionType": "semver"
}
],
"defaultStatus": "affected"
}
],
"descriptions": [
{
"lang": "en",
"value": "An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in extract domain in Synology Chat Server before 2.4.5-22148 allows remote authenticated users, via a UI interaction, to read or write arbitrary files and conduct denial-of-service attacks in DSM."
}
],
"metrics": [
{
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
],
"cvssV3_1": {
"baseScore": 9,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "REQUIRED",
"scope": "CHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH",
"version": "3.1"
}
}
],
"references": [
{
"url": "https://www.synology.com/en-global/security/advisory/Synology_SA_26_10",
"name": "Synology-SA-26:10 Synology Chat Server",
"tags": [
"vendor-advisory"
]
}
],
"credits": [
{
"lang": "en",
"value": "Lam Jun Rong and Javier Koh, Cyber Specialists of the Digital and Intelligence Service (DIS) working with the Centre for Strategic Infocomm Technologies (CSIT) and Dr Joseph Teo, CSIT",
"type": "finder"
}
],
"providerMetadata": {
"orgId": "db201096-a0cc-46c7-9a55-61d9e221bf01",
"shortName": "synology",
"dateUpdated": "2026-08-28T07:07:24.049Z"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-08-28T11:31:57.261097Z",
"id": "CVE-2026-40541",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"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": "2026-08-28T11:44:42.311Z"
}
}
]
}
}