CVE-2020-26117

HighCVSS 8.1/10Last modified Jun 17, 2026

Description

In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-295

Affected software

No affected versions have been published.

Timeline

Published
Sep 27, 2020
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2020-26117: High severity, CVSS 8.1 | Vulnix