Deserialization in Hyland Software Onbase
CVE-2025-34153
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.
Vulnerability class: Insecure Deserialization
Published · last modified .
EPSS exploit prediction
EPSS: 0.007 (49.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Hyland Software Onbase — versions 0, 24.1
Weakness classification (CWE)
References
- gist.github.com/VAMorales/32794cccc2195a935623a12ef32760dc (technical-description, exploit)
- www.hyland.com/en/internal/onbase-unity-client (product)
- support.hyland.com/r/OnBase/WorkView/Foundation-24.1/WorkView/Installation/Upgr… (patch)
- www.vulncheck.com/advisories/hyland-onbase-net-remoting-tcp-channel-unauthentic… (third-party-advisory)
- community.hyland.com/resources/bulletins-and-notices/210540-security-update-hyl… (vendor-advisory, permissions-required, mitigation)