Hyland OnBase contains an unauthenticated .NET Remoting exposure in the OnBase Workflow Timer Service (Hyland.Core.Workflow.NTService.exe). An attacker who can reach the service can send crafted .NET Remoting requests to default HTTP channel endpoints on TCP/8900 (e.g., TimerServiceAPI.rem and TimerServiceEvents.rem for Workflow) to trigger unsafe object unmarshalling, enabling arbitrary file read/write. By writing attacker-controlled content into web-accessible locations or chaining with other OnBase features, this can lead to remote code execution. The same primitive can be abused by supplying a UNC path to coerce outbound NTLM authentication (SMB coercion) to an attacker-controlled host.
Metrics
Affected Vendors & Products
References
History
Fri, 13 Feb 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Hyland OnBase contains an unauthenticated .NET Remoting exposure in the OnBase Workflow Timer Service (Hyland.Core.Workflow.NTService.exe) and is also reported by the vendor to impact the Workview Timer Service (an impacted version range is undefined). An attacker who can reach the service can send crafted .NET Remoting requests to default HTTP channel endpoints on TCP/8900 (e.g., TimerServiceAPI.rem and TimerServiceEvents.rem for Workflow) to trigger unsafe object unmarshalling, enabling arbitrary file read/write. By writing attacker-controlled content into web-accessible locations or chaining with other OnBase features, this can lead to remote code execution. The same primitive can be abused by supplying a UNC path to coerce outbound NTLM authentication (SMB coercion) to an attacker-controlled host. | Hyland OnBase contains an unauthenticated .NET Remoting exposure in the OnBase Workflow Timer Service (Hyland.Core.Workflow.NTService.exe). An attacker who can reach the service can send crafted .NET Remoting requests to default HTTP channel endpoints on TCP/8900 (e.g., TimerServiceAPI.rem and TimerServiceEvents.rem for Workflow) to trigger unsafe object unmarshalling, enabling arbitrary file read/write. By writing attacker-controlled content into web-accessible locations or chaining with other OnBase features, this can lead to remote code execution. The same primitive can be abused by supplying a UNC path to coerce outbound NTLM authentication (SMB coercion) to an attacker-controlled host. |
Fri, 13 Feb 2026 16:15:00 +0000
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| Metrics |
ssvc
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Fri, 13 Feb 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Hyland OnBase contains an unauthenticated .NET Remoting exposure in the OnBase Workflow Timer Service (Hyland.Core.Workflow.NTService.exe) and is also reported by the vendor to impact the Workview Timer Service (an impacted version range is undefined). An attacker who can reach the service can send crafted .NET Remoting requests to default HTTP channel endpoints on TCP/8900 (e.g., TimerServiceAPI.rem and TimerServiceEvents.rem for Workflow) to trigger unsafe object unmarshalling, enabling arbitrary file read/write. By writing attacker-controlled content into web-accessible locations or chaining with other OnBase features, this can lead to remote code execution. The same primitive can be abused by supplying a UNC path to coerce outbound NTLM authentication (SMB coercion) to an attacker-controlled host. | |
| Title | Hyland OnBase Timer Services Unauthenticated .NET Remoting RCE | |
| Weaknesses | CWE-502 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-02-13T17:10:26.532Z
Reserved: 2026-02-11T20:08:07.945Z
Link: CVE-2026-26221
Updated: 2026-02-13T15:37:30.868Z
Status : Received
Published: 2026-02-13T16:16:11.683
Modified: 2026-02-13T16:16:11.683
Link: CVE-2026-26221
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OpenCVE Enrichment
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