CVE-2025-34153

Hyland OnBase < 17.0.2.87 .NET Remoting TCP Channel Unauthenticated RCE

10.0 Critical

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.71%Up 0.4 points since Aug 14, 2025

What each source reports

CVE List Score used 10.0

Hyland OnBase < 17.0.2.87 .NET Remoting TCP Channel Unauthenticated RCE

Record: CVE-2025-34153
CVSS 4.0: 10.0 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Weakness: CWE-502
Updated: 2026-11-02

EUVDEUVD-2025-24595 10.0

Record: EUVD-2025-24595
CVSS 4.0: 10.0 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-4vjp-phjj-3f57 10.0

Hyland OnBase versions prior to 17.0.2.87 (other versions may be affected) are vulnerable to...

Record: GHSA-4vjp-phjj-3f57
CVSS 4.0: 10.0 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness: CWE-502
Updated: 2026-11-02

NVD 10.0

Record: CVE-2025-34153
CVSS 4.0: 10.0 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness: CWE-502
Updated: 2026-11-02

Affected products

hyland software onbase

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-34153 is a critical vulnerability (CVSS 10.0) in Hyland Software Onbase, published August 13, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.71%, the 53rd percentile. No source names a fixed version.