CVE-2026-22320
Stack-Based Buffer Overflow in CLI TFTP Causes DoS
Publication date: 2026-03-18
Last updated on: 2026-03-18
Assigner: CERT VDE
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| phoenix_contact | fl_switch | to 3.53 (exc) |
Helpful Resources
Exploitability
| 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 Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know