CVE-2025-15561
Local Privilege Escalation in NesterSoft WorkTime
- State
- Published
- Severity
- 7.8 High
- Published
- Feb 19, 2026
- Updated
- Feb 23, 2026
- Reserved
- Feb 4, 2026
Description
An attacker can exploit the update behavior of the WorkTime monitoring daemon to elevate privileges on the local system to NT Authority\SYSTEM. A malicious executable must be named WTWatch.exe and dropped in the C:\ProgramData\wta\ClientExe directory, which is writable by "Everyone". The executable will then be run by the WorkTime monitoring daemon.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-269 Improper Privilege Management
Affected Products
| Product | Versions |
|---|---|
WorkTime (on-prem/cloud)NesterSoft Inc. |
|
References
- https://r.sec-consult.com/worktimethird-party-advisory
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