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Public proof of concept

CVE-2023-0587

A public proof of concept exists; no exploitation attested.

  • Published2023-02-01
  • WeaknessCWE-434

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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 (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.

Timeline

dates in UTC
  1. 2023-02-0103:15CVE publishedNVD
  2. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-0587?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-0587?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Trendmicro apex one
BranchAffectedFixed in
—all versionsno fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionpoc2025-03-27
  • OpenCVESSVC decisionpoc—
  • CISA-ADPCVSS 3.19.12025-03-27
  • NVDCVSS 3.19.1read 2026-10-23
  • CISA-ADPweakness (CWE)CWE-4342025-03-27
  • NVDweakness (CWE)CWE-434read 2026-10-23
  • FIRST EPSSEPSS score59.6 %read 2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Published
2023-02-01
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2023-0587?

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 (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.

Is CVE-2023-0587 actively exploited?

A proof-of-concept exploit exists for CVE-2023-0587, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2023-0587?

CVE-2023-0587 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

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