Description

Improper authentication handling was identified in a set of HTTP POST requests affecting the following product families:

* Digi PortServer TS - prior to and including 82000747_AA, build date 06/17/2022

* Digi One SP/Digi One SP IA/Digi One IA - prior to and including 82000774_Z, build date 10/19/2020

* Digi One IAP – prior to and including 82000770 Z, build date 10/19/2020

A specially crafted POST request to the device’s web interface may allow an unauthenticated attacker to modify configuration settings.

Classification

CVE ID: CVE-2025-3659

CVSS Base Severity: CRITICAL

CVSS Base Score: 9.4

CVSS Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L

Affected Products

Vendor: Digi International

Product: Digi PortServer TS, Digi One SP/Digi One SP IA/Digi One IA, Digi One IAP

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.19% (probability of being exploited)

EPSS Percentile: 41.55% (scored less or equal to compared to others)

EPSS Date: 2025-06-07 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-3659
https://hub.digi.com/support/products/infrastructure-management/digi-portserver-ts/
https://hub.digi.com/support/products/infrastructure-management/digi-one-sp-ia/
https://hub.digi.com/support/products/infrastructure-management/digi-one-iap-haz/
https://www.digi.com/getattachment/Resources/Security/Alerts/Improper-authentication-handling-for-Digi-PortServ/improper-authentication-handling.pdf

Timeline