CVE-2025-15561
Local Privilege Escalation in NesterSoft WorkTime
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.
INFO
Published Date :
Feb. 19, 2026, 11:15 a.m.
Last Modified :
Feb. 26, 2026, 2:58 a.m.
Remotely Exploit :
No
Source :
551230f0-3615-47bd-b7cc-93e92e730bbf
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Restrict permissions on C:\ProgramData\wta\ClientExe.
- Ensure WTWatch.exe is signed by a trusted publisher.
- Monitor the ClientExe directory for unauthorized files.
- Review daemon update and execution processes.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-15561.
| URL | Resource |
|---|---|
| https://r.sec-consult.com/worktime | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-15561 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-15561
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-15561 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-15561 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Feb. 26, 2026
Action Type Old Value New Value Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:nestersoft:worktime:*:*:*:*:cloud:*:*:* versions up to (including) 11.8.8 *cpe:2.3:a:nestersoft:worktime:*:*:*:*:on-premise:*:*:* versions up to (including) 11.8.8 Added Reference Type SEC Consult Vulnerability Lab: https://r.sec-consult.com/worktime Types: Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Feb. 23, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 551230f0-3615-47bd-b7cc-93e92e730bbf
Feb. 19, 2026
Action Type Old Value New Value Added 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. Added CWE CWE-269 Added Reference https://r.sec-consult.com/worktime