CVE-2025-34153

Public Exploit
Hyland OnBase .NET Remoting TCP Channel Unauthenticated RCE

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.

Category

10.0
CVSS
Severity: Critical
CVSS 4.0 •
EPSS 0.33%
Affected: Hyland Software OnBase
Published at:
Updated at:

References

Link Tags
https://gist.github.com/VAMorales/32794cccc2195a935623a12ef32760dc exploit technical description
https://www.hyland.com/en/internal/onbase-unity-client product
https://support.hyland.com/r/OnBase/WorkView/Foundation-24.1/WorkView/Installation/Upgrade-Considerations/Upgrading-to-OnBase-Version-Foundation-24.1 patch

Frequently Asked Questions

What is the severity of CVE-2025-34153?
CVE-2025-34153 has been scored as a critical severity vulnerability.
How to fix CVE-2025-34153?
To fix CVE-2025-34153, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-34153 being actively exploited in the wild?
It is possible that CVE-2025-34153 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-34153?
CVE-2025-34153 affects Hyland Software OnBase.
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