What is CVE-2025-10659?

CVE-2025-10659 is a critical-severity vulnerability in Megasys Telenium Online Web Application:, classified under OS Command Injection. CVSS score: 9.8/10. Published 2025-09-30.

How severe is CVE-2025-10659?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2025-10659 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Megasys Telenium Online Web Application:

CVE-2025-10659

The Telenium Online Web Application is vulnerable due to a PHP endpoint accessible to unauthenticated network users that improperly handles user-supplied input. This vulnerability occurs due to the insecure termination of a regular expression check within the endpoint. Because the input is not correctly validated or sanitized, an unauthenticated attacker can inject arbitrary operating system commands through a crafted HTTP request, leading to remote code execution on the server in the context of the web application service account.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.012 (63.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Megasys Telenium Online Web Application: — versions 0

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

Frequently asked questions

What is CVE-2025-10659?: CVE-2025-10659 is a critical-severity vulnerability in Megasys Telenium Online Web Application:, classified under OS Command Injection. CVSS score: 9.8/10. Published 2025-09-30.
How severe is CVE-2025-10659?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2025-10659 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.