Description
Cendio 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.
Metrics
CVSS 3.1 8.8/10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Cendio | ThinLinc | >= 4.1.0, < 4.15.1; >= 4.16.0, < 4.16.1; >= 4.17.0, < 4.17.1; >= 4.18.0, < 4.18.1; >= 4.19.0, < 4.19.1; >= 4.20.0, < 4.20.1 |
References
Timeline
- Published
- Nov 5, 2026
- Last modified
- Nov 12, 2026
- NVD status
- Awaiting Analysis