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TI-2026-85464 Aliases CVE-2026-119744GHSA-5r8q-rp82-m3v2

Authentication bypass in Cendio ThinLinc web access client

Priority LOW 36CWE-290Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-290.

Summary

Cendio ThinLinc from 4.1.0 before 4.15.1, from 4.16.0 before 4.16.1, from 4.17.0 before 4.17.1, from 4.18.0 before 4.18.1, from 4.19.0 before 4.19.1 and from 4.20.0 before 4.20.1 contains an improper authentication flaw in its browser-based web client (tlwebaccess). Flaws in multi-step login flows such as one-time passwords, login banners and expired password prompts let an attacker spoof identity (CWE-290). An authenticated attacker can impersonate any other user, including root, and gain administrative access.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00439 38th percentileScored 2026-11-07
Fix Fixed ThinLinc (Cendio): 4.15.1, 4.16.1, 4.17.1 +3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CendioThinLinc4.1.0 to before 4.15.1; 4.16.0 to before 4.16.1; 4.17.0 to before 4.17.1; 4.18.0 to before 4.18.1; 4.19.0 to before 4.19.1; 4.20.0 to before 4.20.14.15.1, 4.16.1, 4.17.1, 4.18.1, 4.19.1, 4.20.1Patch availableCNA
  • ThinLinc VendorCendio Affected 4.1.0 to before 4.15.1; 4.16.0 to before 4.16.1; 4.17.0 to before 4.17.1; 4.18.0 to before 4.18.1; 4.19.0 to before 4.19.1; 4.20.0 to before 4.20.1 Fixed in 4.15.1, 4.16.1, 4.17.1, 4.18.1, 4.19.1, 4.20.1 Patch available CNA

Remediation

Upgrade Cendio ThinLinc to version 4.15.1, 4.16.1, 4.17.1, 4.18.1, 4.19.1 or 4.20.1, depending on the installed release.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA ThinLinc (Cendio) Fixed in 4.15.1, 4.16.1, 4.17.1, 4.18.1, 4.19.1, 4.20.1

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-11-05 Threatist record created from CVE-2026-119744
  2. 2026-11-05 Alias added: GHSA-5r8q-rp82-m3v2
  3. 2026-11-05 CISA SSVC decision points changed
  4. 2026-11-05 Priority changed: MEDIUM → LOW
  5. 2026-11-06 Affected versions changed · Red Hat
  6. 2026-11-06 CVSS score added · Red Hat

References

Patch 1

Advisory 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences