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Case File

CVE-2021-39556

MEDIUM · CVSS 5.5 EPSS 0.64% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-09-20 · 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 ↗

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

CVE
CVE-2021-39556
Severity
MEDIUM
CVSS
5.5
EPSS
0.64%

Original NVD Description

An issue was discovered in swftools through 20200710. A NULL pointer dereference exists in the function InfoOutputDev::type3D1() located in InfoOutputDev.cc. It allows an attacker to cause Denial of Service.