CVE-2025-15561 (GCVE-0-2025-15561)
Vulnerability from cvelistv5 – Published: 2026-02-19 10:53 – Updated: 2026-02-23 18:26
VLAI?
Title
Local Privilege Escalation in NesterSoft WorkTime
Summary
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.
Severity ?
7.8 (High)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| NesterSoft Inc. | WorkTime (on-prem/cloud) |
Affected:
<= 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
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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