Local Privilege Escalation in NesterSoft WorkTime
Priority HIGH 69CWE-269Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-269.
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0012 1st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| NesterSoft Inc. | WorkTime (on-prem/cloud) | up to 11.8.8 | — | No fix listed | CNA |
- WorkTime (on-prem/cloud) VendorNesterSoft Inc. Affected up to 11.8.8 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nestersoft:worktime:*:*:*:*:cloud:*:*:* | up to 11.8.8 | Vulnerable | NesterSoft Inc. |
| cpe:2.3:a:nestersoft:worktime:*:*:*:*:on-premise:*:*:* | up to 11.8.8 | Vulnerable | NesterSoft Inc. |
- cpe:2.3:a:nestersoft:worktime:*:*:*:*:cloud:*:*:* Versions up to 11.8.8 Vulnerable ·NesterSoft Inc.
- cpe:2.3:a:nestersoft:worktime:*:*:*:*:on-premise:*:*:* Versions up to 11.8.8 Vulnerable ·NesterSoft Inc.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-15561
- 2026-10-03 Alias added: GHSA-6x8c-24f7-p33h
References
Advisory 1
More NesterSoft Inc. Worktime vulnerabilities
- TI-2025-14198 Unauthenticated OS Command Injection in NesterSoft WorkTime CVSS 3.1CRITICAL 9.8
- TI-2025-14199 SQL Injection in NesterSoft WorkTime CVSS 3.1HIGH 8.8
- TI-2025-14202 Broken Access Control results in Denial of Service in NesterSoft WorkTime CVSS 3.1MEDIUM 5.3
- TI-2025-14201 Reflected Cross-Site Scripting in NesterSoft WorkTime CVSS 3.1MEDIUM 6.1
Sources
- CVE-2025-15561 · CVE Program
- CVE-2025-15561 · NVD
- FIRST EPSS
- GHSA-6x8c-24f7-p33h · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences