VULNERABILITY INTELLIGENCE

CVE-2021-21005

CVSS score7.5 HIGH
EPSS probability0.68%
CISA KEVNot currently listed
Published2021-06-25
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • info@cert.vde.com: CWE-362

Primary references