CVE-2026-22320 Details
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.
A stack-based buffer overflow vulnerability has been identified in the TFTP file-transfer command handling of Phoenix Contact FL SWITCH 2xxx, FL SWITCH TSN 23xx, and FL SWITCH 59xx firmware prior to version 3.53. This vulnerability allows a low-privileged attacker with Telnet or SSH access to cause memory corruption by providing unexpected or oversized filename inputs. Exploitation of this vulnerability leads to internal buffer corruption, causing the command-line interface and web dashboard to become unavailable, thereby creating a denial-of-service condition.
Users are advised to update to the latest firmware version 3.53, which addresses this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 18, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://certvde.com/de/advisories/VDE-2025-104 | [email protected] |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
No affected product data is available for this CVE.
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 18, 2026 | New CVE Received | [email protected] |