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CVE-2026-53909 Arbitrary File Upload in MCO

🗓️ 01 Jul 2026 11:59:26Reported by CERT-PLType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

MCO does not correctly validate types of uploaded files. File upload validation functionality relies only on client-side checks, which can be bypassed. An authorized, low-privileged attacker can upload files with arbitrary types to the server. Bec...

Related
Affected
Refs
ReporterTitlePublishedViews
Family
CVE
CVE-2026-53909
1 Jul 202611:59
cve
EUVD
EUVD-2026-40955
1 Jul 202611:59
euvd
NVD
CVE-2026-53909
1 Jul 202613:17
nvd
[
  {
    "vendor": "MyComplianceOffice",
    "product": "MCO",
    "versions": [
      {
        "status": "affected",
        "version": "25.3.3.1",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  }
]

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01 Jul 2026 11:59Current
CVSS 45.3
4