NesterSoft WorkTime up to 11.8.8 WTWatch.exe privileges management

Summaryinfo

A vulnerability was found in NesterSoft WorkTime up to 11.8.8. It has been classified as critical. The affected element is an unknown function of the file WTWatch.exe. Performing a manipulation results in privileges management. This vulnerability is cataloged as CVE-2025-15561. The attack must be initiated from a local position. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in NesterSoft WorkTime up to 11.8.8. This affects an unknown code block of the file WTWatch.exe. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was shared by Tobias Niemann. The advisory is shared at r.sec-consult.com. This vulnerability is uniquely identified as CVE-2025-15561 since 02/04/2026. The exploitability is told to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/27/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• NesterSoft

Name

• WorkTime

Version

• 11.8.0
• 11.8.1
• 11.8.2
• 11.8.3
• 11.8.4
• 11.8.5
• 11.8.6
• 11.8.7
• 11.8.8

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CPE 2.2info

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