# Improper authentication handling for Digi PortServer TS; Digi One SP, SP IA, IA; Digi One IAP

CVE record · `CVE-2025-3659`

- **Identifiers:** `CVE-2025-3659`
- **State:** Confirmed
- **Severity:** CVSS 9.4 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** Digi
- **Weakness (CWE):** [CWE-287](https://cwe.mitre.org/data/definitions/287.html)
- **Tags:** [Authentication bypass](https://agentprime.io/advisories/tag/auth-bypass.md)
- **Technologies:** [Digi International Digi PortServer TS](https://agentprime.io/advisories/technology/digi-international-digi-portserver-ts.md) · [Digi International Digi One SP/Digi One SP IA/Digi One IA](https://agentprime.io/advisories/technology/digi-international-digi-one-sp-digi-one-sp-ia-digi-one-ia.md) · [Digi International Digi One IAP](https://agentprime.io/advisories/technology/digi-international-digi-one-iap.md)
- **Published:** 12 May 2025
- **Updated:** 12 May 2025
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Digi) at 12 May 2025, 20:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Critical

Critical, because:

- CVSS score 9.4: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Digi International. Product: Digi PortServer TS.
  - affected: `82000747_AA and earlier` (custom)
  - Other versions: affected
- Vendor: Digi International. Product: Digi One SP/Digi One SP IA/Digi One IA.
  - affected: `82000774_Z and earlier` (custom)
  - Other versions: affected
- Vendor: Digi International. Product: Digi One IAP.
  - affected: `82000770 Z and earlier` (custom)
  - Other versions: affected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 9.4 Critical, CVSS 4.0: `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`, from CNA (Digi)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0032, the 25th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 12 May 2025. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2025-3659](https://www.cve.org/CVERecord?id=CVE-2025-3659)
- [NVD: CVE-2025-3659](https://nvd.nist.gov/vuln/detail/CVE-2025-3659)

### References from the CNA

- <https://hub.digi.com/support/products/infrastructure-management/digi-portserver-ts/> (patch)
- <https://hub.digi.com/support/products/infrastructure-management/digi-one-sp-ia/> (patch)
- <https://hub.digi.com/support/products/infrastructure-management/digi-one-iap-haz/> (patch)
- <https://www.digi.com/getattachment/Resources/Security/Alerts/Improper-authentication-handling-for-Digi-PortServ/improper-authentication-handling.pdf> (vendor-advisory)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2025-3659>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2025-3659/>. Everything for agents: <https://agentprime.io/llms.txt>.