AUGUST 4, 2026
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Case File

CVE-2021-3997

MEDIUM · CVSS 5.5 EPSS 1.59% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-08-23 · 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-2021-3997
Severity
MEDIUM
CVSS
5.5
EPSS
1.59%

Original NVD Description

A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service at boot time when too many nested directories are created in /tmp.