CVE-2020-26117

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CVSS 3.1

8.1 high

EPSS

3%p87

Published

Sep 27, 2020 (Sep 27, 2020)

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.

Vendors: tigervnc debian opensuse
Products: tigervnc, debian linux, leap
Weakness: CWE-295
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

NVD CVE.org GitHub PoCs EPSS (3.1%)

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