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Case File

CVE-2018-20764

CRITICAL · CVSS 9.8 EPSS 1.19% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2019-02-08 · Last synced 2026-08-04

Field Assessment

AI analysis pending.

Exhibit — Public Exploit Signal

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

Detected Signals
exploit

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

CVE
CVE-2018-20764
Severity
CRITICAL
CVSS
9.8
EPSS
1.19%
Linux

Original Filing — NVD Description

A buffer overflow exists in HelpSystems tcpcrypt on Linux, used for BoKS encrypted telnet through BoKS version 6.7.1. Since tcpcrypt is setuid, exploitation leads to privilege escalation.