AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2021-40391

CRITICAL · CVSS 9.8 EPSS 2.89% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-11-19 · 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.

Detected Signals
code execution

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

CVE
CVE-2021-40391
Severity
CRITICAL
CVSS
9.8
EPSS
2.89%

Original NVD Description

An out-of-bounds write vulnerability exists in the drill format T-code tool number functionality of Gerbv 2.7.0, dev (commit b5f1eacd), and the forked version of Gerbv (commit 71493260). A specially-crafted drill file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.