AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2021-40439

MEDIUM · CVSS 6.5 EPSS 3.35% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-10-07 · 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
exploit

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

CVE
CVE-2021-40439
Severity
MEDIUM
CVSS
6.5
EPSS
3.35%
Office Apache

Original NVD Description

Apache OpenOffice has a dependency on expat software. Versions prior to 2.1.0 were subject to CVE-2013-0340 a "Billion Laughs" entity expansion denial of service attack and exploit via crafted XML files. ODF files consist of a set of XML files. All versions of Apache OpenOffice up to 4.1.10 are subject to this issue. expat in version 4.1.11 is patched.