CVE-2025-15561
Local Privilege Escalation in NesterSoft WorkTime
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-269 |
| Vendor | nestersoft inc. |
| Product | worktime (on-prem/cloud) |
| Published | Feb 19, 2026 |
| Last Updated | Feb 23, 2026 |
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Affected Versions
NesterSoft Inc. / WorkTime (on-prem/cloud)
<= 11.8.8
Credits
Tobias Niemann, SEC Consult Vulnerability Lab Daniel Hirschberger, SEC Consult Vulnerability Lab Thorger Jansen, SEC Consult Vulnerability Lab Marius Renner, SEC Consult Vulnerability Lab