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CVE-2026-61884 is an authentication bypass vulnerability affecting the web management interface of Tycon Systems TPDIN-Monitor-WEB2 version 2.3.9. The login mechanism fails to perform server-side validation of supplied credentials. As a result, an unauthenticated remote attacker can submit empty values for both credential fields and still obtain a valid administrative session. The flaw effectively defeats the device’s access control boundary and exposes the full administrative interface without requiring a legitimate account. Once authenticated as an administrator, the attacker can access management functions related to power relay control, device reboot operations, remote access service configuration, and network settings. Because the product is used to monitor and control remote infrastructure, the vulnerability has direct operational and potentially physical consequences.
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No public exploit code observed for this vulnerability.
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A critical authentication bypass vulnerability in the Tycon TPDIN-Monitor-WEB2 web interface caused by missing server-side credential validation, allowing unauthenticated remote attackers to obtain full administrative access.
An authentication bypass vulnerability in the web management interface of Tycon Systems TPDIN-Monitor-WEB2 that allows unauthenticated remote attackers to log in with empty credentials and gain administrative access.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
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