Critical severity9.8NVD Advisory· Published Feb 19, 2026· Updated Jun 17, 2026
CVE-2025-15559
CVE-2025-15559
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.
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Affected products
4cpe:2.3:a:nestersoft:worktime:*:*:*:*:cloud:*:*:*+ 2 more
- cpe:2.3:a:nestersoft:worktime:*:*:*:*:cloud:*:*:*range: <=11.8.8
- cpe:2.3:a:nestersoft:worktime:*:*:*:*:on-premise:*:*:*range: <=11.8.8
- (no CPE)
- Range: <= 11.8.8
Patches
Vulnerability mechanics
References
1- r.sec-consult.com/worktimenvdThird Party Advisory
News mentions
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