CVE-2025-3659

Unauthenticated configuration changes via crafted HTTP POST requests

Published May 12, 2025 · Updated May 12, 2025

Improper authentication in Digi PortServer TS and Digi One IAP firmware allows remote attackers to modify settings through crafted HTTP POST requests. The web interface accepts specially crafted POST requests that reach configuration-setting operations without enforcing authentication; Digi has not disclosed the affected endpoints or validation error. Network access to the enabled web interface is required; affected bounds are 82000747_AA and earlier for PortServer TS and 82000770 Z and earlier for Digi One IAP.

CVSS severity9.4
Critical
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Digi PortServer TS and Digi One IAP firmware allows remote attackers to modify settings through crafted HTTP POST requests. The web interface accepts specially crafted POST requests that reach configuration-setting operations without enforcing authentication; Digi has not disclosed the affected endpoints or validation error. Network access to the enabled web interface is required; affected bounds are 82000747_AA and earlier for PortServer TS and 82000770 Z and earlier for Digi One IAP.

The record

CVE
CVE-2025-3659
Published
May 12, 2025
Updated
May 12, 2025
Vendor
Digi International
Product
Digi PortServer TS
Classifications
CWE-287
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2025CVE publishedPublication date reported by the CVE source.
  2. May 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=82000747_AA

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Digi International · Digi PortServer TSversion=0 <=82000747_AA
Digi International · Digi One IAPversion=0 <=82000770 Z

Published CVSS scores

9.4CISA-ADPCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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