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01 Record

CVE-2025-15559

Unauthenticated OS Command Injection in NesterSoft WorkTime

CriticalPUBLISHEDCNA: SEC-VLab
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

02 Description

Unauthenticated OS Command Injection in NesterSoft WorkTime

03 Exploitation and scoring

Exploitation
Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
SSVC decision
  • ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.51% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 43.4% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-02-19 10:45Z8 MO AGO
Last updated
2026-02-23 18:30Z8 MO AGO
Reserved
2026-02-04
Assigning CNA
SEC-VLab
Record state
PUBLISHED
Severity
Critical (CVSS 9.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base
Data version
5.2
Document digest
3f3b2b987c5b566c11dc3ee379c48bb00189a1520d07bc9fd82b52391a3cf7ca

05 Affected products

VendorProductVersionsPlatforms
NesterSoft Inc.WorkTime (on-prem/cloud)<= 11.8.8—

06 References

07 Remediation

The vendor did not respond to our communication attempts anymore. It is currently as of February 2026 unclear, whether a patch is available. Please contact the vendor to request a patch for the identified critical security issues.