An improper restriction of excessive authentication attempts vulnerability in Auto block in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote attackers to read limited files via brute-force attacks.
PUBLISHED5.2CWE-307
Problem type
Affected products
Synology
DiskStation Manager (DSM)
< 7.3.2-86009-2 - AFFECTED
< 7.2.2-72806-7 - AFFECTED
< 7.2.1-69057-10 - AFFECTED
< 7.2.1 - UNKNOWN
References
GitHub Security Advisories
GHSA-wprf-f59w-2hpp
An improper restriction of excessive authentication attempts vulnerability in Auto block in...
https://github.com/advisories/GHSA-wprf-f59w-2hppAn improper restriction of excessive authentication attempts vulnerability in Auto block in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote attackers to read limited files via brute-force attacks.
JSON source
https://cveawg.mitre.org/api/cve/CVE-2026-40538Click to expand
{
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"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-40538",
"assignerOrgId": "db201096-a0cc-46c7-9a55-61d9e221bf01",
"assignerShortName": "synology",
"dateUpdated": "2026-09-18T09:27:24.605Z",
"dateReserved": "2026-04-14T01:01:14.607Z",
"datePublished": "2026-09-18T08:29:15.878Z",
"state": "PUBLISHED"
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"containers": {
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"descriptions": [
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"value": "An improper restriction of excessive authentication attempts vulnerability in Auto block in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote attackers to read limited files via brute-force attacks."
}
],
"affected": [
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"product": "DiskStation Manager (DSM)",
"defaultStatus": "affected",
"versions": [
{
"version": "7.3.2",
"status": "affected",
"versionType": "semver",
"lessThan": "7.3.2-86009-2"
},
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{
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"problemTypes": [
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"descriptions": [
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"description": "Improper Restriction of Excessive Authentication Attempts",
"cweId": "CWE-307",
"type": "CWE"
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"references": [
{
"url": "https://www.synology.com/en-global/security/advisory/Synology_SA_26_06",
"name": "Synology-SA-26:06 DSM"
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"metrics": [
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"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"availabilityImpact": "NONE",
"baseScore": 3.7,
"baseSeverity": "LOW"
}
}
],
"credits": [
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"lang": "en",
"value": "Andreas Rothenbacher (error401.de)",
"type": "finder"
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}
}
}