CVE-2026-22320
Received Received - Intake
Stack-Based Buffer Overflow in CLI TFTP Causes DoS

Publication date: 2026-03-18

Last updated on: 2026-03-18

Assigner: CERT VDE

Description
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.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-03-18
Last Modified
2026-03-18
Generated
2026-06-16
AI Q&A
2026-03-18
EPSS Evaluated
2026-06-14
NVD
CVE-2026-22320
EUVD
EUVD-2026-12789
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
phoenix_contact fl_switch to 3.53 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability is a stack-based buffer overflow in the command-line interface's (CLI) TFTP file-transfer command handling. It allows a low-privileged attacker who has Telnet or SSH access to cause memory corruption by providing unexpected or oversized filename input.

When exploited, this memory corruption affects the internal buffer, which causes the CLI and the web dashboard to become unavailable, resulting in a denial of service.

Impact Analysis

The impact of this vulnerability is a denial of service condition. An attacker with low privileges and Telnet/SSH access can cause the CLI and web dashboard to become unavailable by triggering memory corruption through the TFTP file-transfer command.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

I don't know

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-22320. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart