CVE-2026-22320 MEDIUM

CVE-2026-22320: Stack-Based Buffer Overflow in TFTP File-Transfer Command Handling over CLI

Vendor Phoenix Contact
Product FL SWITCH 2005
Weakness CWE-121
Published March 18, 2026
Last update March 18, 2026

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

A stack-based buffer overflow in the CLI's TFTP file‑transfer command handling allows a low-privileged attacker with Telnet/SSH access to trigger memory corruption by supplying unexpected or oversized filename input. Exploitation results in the corruption of the internal buffer, causing the CLI and web dashboard to become unavailable and leading to a denial of service.

Key dates

02Disclosure timeline

March 18, 2026 CVE published
March 18, 2026 Record updated