CVE-2026-61884

CRITICAL 9.8

Tycon Systems TPDIN-Monitor-WEB2 Authentication Bypass Using an Alternate Path or Channel

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

The web management interface of Tycon Systems TPDIN-Monitor-WEB2 does not perform server-side validation of credentials during the login process. By submitting empty values for both credential fields, an unauthenticated remote attacker can bypass the authentication check and establish a valid administrative session. This grants full access to device controls including power relay management, device reboot, remote access service configuration, and network settings, which could allow an attacker to disrupt connected infrastructure or cause physical damage to equipment.

CWE	CWE-288
Vendor	tycon systems
Product	tpdin-monitor-web2
Published	Jul 24, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Tycon Systems / TPDIN-Monitor-WEB2

2.3.9

References

NVD ↗ CVE.org ↗ EPSS Data ↗

tyconsystems.com: https://www.tyconsystems.com/contact cisa.gov: https://www.cisa.gov/news-events/ics-advisories/icsa-26-202-01 github.com: https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-202-01.json

Credits

Abdiwelli Guled reported this vulnerability to CISA.