AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2021-39167

CRITICAL · CVSS 10 EPSS 1.59% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-08-27 · 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 ↗

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

CVE
CVE-2021-39167
Severity
CRITICAL
CVSS
10
EPSS
1.59%

Original NVD Description

OpenZepplin is a library for smart contract development. In affected versions a vulnerability in TimelockController allowed an actor with the executor role to escalate privileges. Further details about the vulnerability will be disclosed at a later date. As a workaround revoke the executor role from accounts not strictly under the team's control. We recommend revoking all executors that are not also proposers. When applying this mitigation, ensure there is at least one proposer and executor remaining.