CVE-2025-34153CWE-502

Hyland OnBase < 17.0.2.87 .NET Remoting TCP Channel Unauthenticated RCE

Critical · published August 13, 2025

CVSS v4.0
10.0
EPSS
1%
Percentile
50.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
10.0 · CRITICAL
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
EPSS
0.00658 · 50.9th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2025-08-13T16:51Z
EPSS history
Timeline
  • 13 AUG 16:51Z
    Hyland OnBase < 17.0.2.87 .NET Remoting TCP Channel Unauthenticated RCE
    cvelistv5