CVE-2025-34153

Hyland OnBase < 17.0.2.87 .NET Remoting TCP Channel Unauthenticated RCE

Published Aug 13, 2025 CVSS 4.0 · 10 Critical EPSS < 1% KEV · Not listed
Description
Hyland OnBase versions prior to 17.0.2.87 (other versions may be affected) are vulnerable to unauthenticated remote code execution via insecure deserialization on the .NET Remoting TCP channel. The service registers a listener on port 6031 with the URI endpoint TimerServer, implemented in Hyland.Core.Timers.dll. This endpoint deserializes untrusted input using the .NET BinaryFormatter, allowing attackers to execute arbitrary code under the context of NT AUTHORITY\SYSTEM.

Remediation

Vendor Workaround

It is recommended that customers immediately convert to the in-servicing module, Unity Scheduler. Starting with OnBase 16, Unity Scheduler is the recommended replacement. It is recommended customers using versions prior to 16 upgrade to an in-servicing release of OnBase and leverage Unity Scheduler.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-24595 Hyland OnBase versions prior to 17.0.2.87 (other versions may be affected) are vulnerable to unauthenticated remote code execution via insecure deserialization on the .NET Remoting TCP channel. The service registers a listener on port 6031 with the URI endpoint TimerServer, implemented in Hyland.Core.Timers.dll. This endpoint deserializes untrusted input using the .NET BinaryFormatter, allowing attackers to execute arbitrary code under the context of NT AUTHORITY\SYSTEM.
History
Type Values Removed Values Added
CPEs cpe:2.3:a:hyland:onbase:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Title Hyland OnBase .NET Remoting TCP Channel Unauthenticated RCE Hyland OnBase < 17.0.2.87 .NET Remoting TCP Channel Unauthenticated RCE
Type Values Removed Values Added
First Time appeared Hyland
Hyland onbase
Vendors & Products Hyland
Hyland onbase
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Hyland OnBase versions prior to 17.0.2.87 (other versions may be affected) are vulnerable to unauthenticated remote code execution via insecure deserialization on the .NET Remoting TCP channel. The service registers a listener on port 6031 with the URI endpoint TimerServer, implemented in Hyland.Core.Timers.dll. This endpoint deserializes untrusted input using the .NET BinaryFormatter, allowing attackers to execute arbitrary code under the context of NT AUTHORITY\SYSTEM.
Title Hyland OnBase .NET Remoting TCP Channel Unauthenticated RCE
Weaknesses CWE-502
References
Metrics cvssV4_0

{'score': 10, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
May 15, 2026, 11:14 AM
Reserved
Apr 15, 2025, 7:15 PM
Status
Deferred
Published
Aug 13, 2025, 5:15 PM
Modified
Jun 17, 2026, 9:13 AM