Vulnerability in Cendio Thinlinc
CVE-2026-119744
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (38.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
Weakness classification (CWE)
References
- community.thinlinc.com/t/thinlinc-4-15-1-through-4-20-1-security-release/1985 (release-notes, patch)
- community.thinlinc.com/t/urgent-thinlinc-security-issue/1970 (vendor-advisory)
- www.vulncheck.com/advisories/cendio-thinlinc-improper-authentication-via-web-ac… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119744?
- CVE-2026-119744 is a high-severity vulnerability in Cendio Thinlinc, classified under Authentication Bypass by Spoofing. CVSS score: 8.8/10. Published 2026-11-05.
- How severe is CVE-2026-119744?
- High severity. CVSS v3 base score is 8.8 out of 10.