CVE-2021-21005

HIGH · CVSS 7.5 EPSS 0.68%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-06-25 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE

CVE-2021-21005

Severity

HIGH

CVSS

7.5

EPSS

0.68%

Original NVD Description

In Phoenix Contact FL SWITCH SMCS series products in multiple versions if an attacker sends a hand-crafted TCP-Packet with the Urgent-Flag set and the Urgent-Pointer set to 0, the network stack will crash. The device needs to be rebooted afterwards.