CVE-2026-119744 · Package
NO FIX YET · SEE WHAT TO DO
ThinLinc's browser-based web client (tlwebaccess) has an improper authentication flaw in its multi-step login flows such as one-time passwords, login banners and expired password prompts. An attacker who already has a valid account can switch to another user, including root, and gain administrative access.
first public Nov 5, 2026 · 1 source
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Organisations running Cendio ThinLinc versions 4.1.0 through 4.20.0 with the browser-based web client exposed to users. The flaw requires an authenticated account, so exposure depends on who holds valid logins on the server. Installations without the web client, or on versions outside that range, are not described as affected.
Not affected if versions-outside-4.1.0-4.20.0, web-client-disabled
Who cares cendio, remote-desktop, self-hosted, thinlinc
4.20.0; the sources do not name the exact fixed versionCendio ThinLinc contains an improper authentication vulnerability in its browser-based web client (tlwebaccess) that allows an authenticated attacker to impersonate any other user, including root, by exploiting flaws in multi-step authentication flows such as one-time passwords, login banners, or expired password prompts. Attackers can leverage this authentication bypass during the multi-step login process to gain unauthorized access to other user accounts, including administrative privileges, in versions from 4.1.0 through 4.20.0.
This page as .md · .json · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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