CVE-2025-10639: EfficientLab WorkExaminer Professional · Use of Hard-coded Credentials
Affects EfficientLab WorkExaminer ProfessionalSource CVE Database V5
Not known to be exploited · CVSS 8.8 High.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.9% chance of exploitation in 30 days – higher than 60% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 21 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| EfficientLab WorkExaminer Professional | Affected
| Fixed in– |
AI-suggested
Organizations should immediately identify any WorkExaminer Professional servers running versions up to 4.0.0.52001 and assess exposure of TCP port 12304. Network segmentation and firewall rules should be applied to restrict access to this port only to trusted internal hosts. If possible, disable the embedded FTP server or replace it with a secure alternative that does not use hardcoded credentials. Monitoring and alerting on unexpected FTP connections and file changes in the WorkExaminer installation directory can help detect exploitation attempts. Employing application whitelisting and integrity monitoring on the server can prevent unauthorized binary modifications. Finally, conduct regular audits of user access and network configurations to reduce the attack surface.
Description
The WorkExaminer Professional server installation comes with an FTP server that is used to receive the client logs on TCP port 12304. An attacker with network access to this port can use weak hardcoded credentials to login to the FTP server and modify or read data, log files and gain remote code execution as NT Authority\SYSTEM on the server by exchanging accessible service binaries in the WorkExaminer installation directory (e.g. "C:\Program File (x86)\Work Examiner Professional Server").