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Case File

CVE-2020-26117

HIGH · CVSS 8.1 EPSS 3.06% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2020-09-27 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗ github.com ↗ github.com ↗ github.com ↗ github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2020-26117
Severity
HIGH
CVSS
8.1
EPSS
3.06%
Java

Original NVD 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.