How severe is CVE-2025-15561?

CVE-2025-15561 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-15561 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-15561?

CVE-2025-15561 primarily affects Nestersoft Worktime. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-15561?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-15561 have an EU (EUVD) identifier?

Yes. CVE-2025-15561 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207636.

When was CVE-2025-15561 published?

CVE-2025-15561 was published on 2026-02-19 and last updated on 2026-06-17.

CVE-2025-15561

CVE-2025-15561 is a high-severity vulnerability in Nestersoft Worktime with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-269.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-207636
Weakness: CWE-269
Affected product: Nestersoft Worktime
Published: 2026-02-19
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-15561?: 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.
How severe is CVE-2025-15561?: CVE-2025-15561 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-15561 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-15561?: CVE-2025-15561 primarily affects Nestersoft Worktime. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-15561?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-15561 have an EU (EUVD) identifier?: Yes. CVE-2025-15561 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207636.
When was CVE-2025-15561 published?: CVE-2025-15561 was published on 2026-02-19 and last updated on 2026-06-17.

References

https://r.sec-consult.com/worktime

Affected products (2)

cpe:2.3:a:nestersoft:worktime:*:*:*:*:cloud:*:*:*
cpe:2.3:a:nestersoft:worktime:*:*:*:*:on-premise:*:*:*

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