CVE-2025-15559
CRITICAL EPSS 35.3%
Published Feb 19, 20264mo ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Published Feb 19, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
35.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-78 OS Command Injection Injection
Affected Products 2
| Vendor | Product | Version | Range |
|---|---|---|---|
| nestersoft | worktime | * | ≤11.8.8 |
| nestersoft | worktime | * | ≤11.8.8 |
References 1
- r.sec-consult.com https://r.sec-consult.com/worktime
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.