Risk Letters

Exploited vulnerability

CVE-2023-54405

TLP:CLEAR

Unrestricted Upload of File with Dangerous Type

H3C CVM, the Cloud Virtualization Management component of the H3C CAS cloud platform, contains an unauthenticated arbitrary file upload vulnerability in the /cas/fileUpload/upload endpoint that allows remote attackers to write arbitrary files by manipulating the caller-supplied token parameter without restricting path traversal or file type. Attackers can exploit the path traversal in the token pa

Facts

  • Vendor: H3C
  • Product: H3C CVM
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 0.6 %
  • First known exploitation: 2 October 2026
  • First seen by Risk Letters: 2 October 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD