CVE-2026-21665 Deserialization in Originate Loans Peripherals (formerly Velocity Services) -- Print Service component
Unauthenticated attackers can achieve remote code execution via unsafe deserialization in legacy Print Service components exposed to untrusted networks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-21665?
CVE-2026-21665 is a high-severity unsafe deserialization vulnerability in Fiserv Originate Loans Peripherals (formerly Velocity Services) -- Print Service component, published on 23 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Print Service component of Fiserv Originate Loans Peripherals (formerly Velocity Services) in unsupported version 2021.2.4 (build 4.7.3155.0011) uses deprecated .NET Remoting TCP channels that allow unsafe deserialization of untrusted data. When these services are exposed to an untrusted network in a client-managed deployment, an unauthenticated attacker can achieve remote code execution. Version 2021.2.4 is no longer supported by Fiserv. Customers should upgrade to a currently supported release (2025.1 or later) and ensure that .NET Remoting service ports are not exposed beyond trusted network boundaries. This CVE documents behavior observed in a client-hosted deployment running an unsupported legacy version of Originate Loans Peripherals with .NET Remoting ports exposed to an untrusted network. This is not a default or supported configuration. Customers running legacy versions should upgrade to a currently supported release and ensure .NET Remoting ports are restricted to trusted network segments. The finding does not apply to Fiserv-hosted environments.
Weakness: CWE-502
Which versions are affected by CVE-2026-21665?
How do I fix CVE-2026-21665?
No fix has been published for CVE-2026-21665 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-21665 being exploited?
There is no known exploitation of CVE-2026-21665 in the wild and no public exploit code.
Sources
Also known as GHSA-h68v-wm52-cjcj.