Vulnerability · Published Feb 19, 2026 · Assigned by SEC-VLab
CVE-2025-15561Local Privilege Escalation in NesterSoft WorkTime
High 7.8
In plain English
A high-severity privilege mismanagement in WorkTime (on-prem/cloud) from NesterSoft Inc.. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 98.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| NesterSoft Inc. | WorkTime (on-prem/cloud) | <= 11.8.8 |
Weakness: CWE-269 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://r.sec-consult.com/worktime third-party-advisory