CVE-2026-61884Network attack vector

Unauthenticated administrative access via empty credentials

Published Jul 24, 2026 · Updated Jul 24, 2026

Authentication bypass in Tycon Systems TPDIN-Monitor-WEB2 2.3.9 allows remote attackers to obtain an administrative session. The web login accepts empty username and password fields because the device performs no server-side credential validation. Network access to the management interface is sufficient to control power relays, reboot the device, and change remote-access and network settings.

CVSS severity9.3
Critical
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Tycon Systems TPDIN-Monitor-WEB2 2.3.9 allows remote attackers to obtain an administrative session. The web login accepts empty username and password fields because the device performs no server-side credential validation. Network access to the management interface is sufficient to control power relays, reboot the device, and change remote-access and network settings.

The record

CVE
CVE-2026-61884
Published
Jul 24, 2026
Updated
Jul 24, 2026
Vendor
Tycon Systems
Product
TPDIN-Monitor-WEB2
Classifications
CWE-288, T0866
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 24, 2026Record 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=2.3.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tycon Systems · TPDIN-Monitor-WEB2version=2.3.9

Published CVSS scores

9.3ICS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8CISACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T0866Exploitation of Remote Services

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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