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Case File

CVE-2021-20501

HIGH · CVSS 8.2 EPSS 1.34% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-04-21 · 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-2021-20501
Severity
HIGH
CVSS
8.2
EPSS
1.34%

Original NVD Description

IBM i 7.1, 7.2, 7.3, and 7.4 SMTP allows a network attacker to send emails to non-existent local-domain recipients to the SMTP server, caused by using a non-default configuration. An attacker could exploit this vulnerability to consume unnecessary network bandwidth and disk space, and allow remote attackers to send spam email. IBM X-Force ID: 198056.