AUGUST 4, 2026
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Case File

CVE-2025-15559

CRITICAL · CVSS 9.8 EPSS 0.44%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2026-02-19 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. Exploitation may require the attacker to be authenticated.

CVE
CVE-2025-15559
Severity
CRITICAL
CVSS
9.8
EPSS
0.44%

Original NVD Description

An unauthenticated attacker can inject OS commands when calling a server API endpoint in NesterSoft WorkTime. The server API call to generate and download the WorkTime client from the WorkTime server is vulnerable in the “guid” parameter. This allows an attacker to execute arbitrary commands on the WorkTime server as NT Authority\SYSTEM with the highest privileges. Attackers are able to access or manipulate sensitive data and take over the whole server.

Related CVEs

Other vulnerabilities affecting the same vendor(s)