What’s Vulnerable › Vulnerabilities
CVE-2026-21665
- Severity: high (CVSS 7.7 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-02-23 · updated 2026-06-17
- Weakness: CWE-502
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.
Affected products
- Fiserv Originate Loans Peripherals (formerly Velocity Services) -- Print Service component: from 2021.2.4 before 2021.2.4 — fixed in 2021.2.4
How to fix
Upgrade to a fixed version: Fiserv Originate Loans Peripherals (formerly Velocity Services) -- Print Service component 2021.2.4. Check the vendor advisory for mitigations.
References
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