CVE-2023-0587
Trendmicro Apex One
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-0587 is a critical-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Trendmicro Apex One. Its CVSS base score is 9.1 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Data Obfuscation (T1001); ranked in the top 0.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
A file upload vulnerability exists in Trend Micro Apex One server build 11110. An unauthenticated remote attacker can send an HTTP PUT request containing a malformed Content-Length header to the URL /officescan/console/html/cgi/fcgiOfcDDA.exe, which allows arbitrary files to be written into the SampleSubmission directory (\PCCSRV\TEMP\SampleSubmission) on the server. The flaw is tracked as CWE-434 and carries a CVSS 3.1 score of 9.1.
An attacker requires no credentials and can exploit the issue over the network to upload large numbers of oversized files, exhausting disk space on the volume hosting the Apex One installation and thereby causing denial of service. The same mechanism could also be used to place attacker-controlled content on the server, although the provided description emphasizes resource exhaustion as the primary impact.
The EPSS score for this CVE rose from a low baseline after disclosure to a peak of 0.3184 on 2025-12-11 before receding to the current value of 0.1447, indicating that exploitation interest increased measurably in the period following public release. The only referenced advisory is Tenable research note TRA-2023-5.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-12627
Vulnerability Data
A file upload vulnerability in exists in Trend Micro Apex One server build 11110. Using a malformed Content-Length header in an HTTP PUT message sent to URL /officescan/console/html/cgi/fcgiOfcDDA.exe, an unauthenticated remote attacker can upload arbitrary files to the SampleSubmission directory…
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(i.e., \PCCSRV\TEMP\SampleSubmission) on the server. The attacker can upload a large number of large files to fill up the file system on which the Apex One server is installed.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V5.1.1
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Requiring identifiable owners for portable devices reduces the attack surface for unrestricted uploads of dangerous file types via anonymous media.
Dangerous file uploads can be detonated in the chamber to determine malice before any production write or execution occurs.
Prevents unrestricted writing of arbitrary or malicious firmware by keeping hardware write-protect enabled except under tightly controlled manual procedures.
Scans files from external sources on download/open/execute, blocking unrestricted uploads of dangerous file types.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Hardened configuration baselines can enforce allowed file types and processing rules.
Restricting execution of unauthorized software directly blocks dangerous uploaded files from running.
Secure development practices include input validation and file-type restrictions that prevent this weakness.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.