Medium severity · published Mar 18, 2026
CVE-2026-22316
Buffer Overflow using TFTP Filename
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
A remote attacker with user privileges for the webUI can use the setting of the TFTP Filename with a POST Request to trigger a stack-based Buffer Overflow, resulting in a DoS attack.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FS
FL SWITCH 2005 · Phoenix Contact
0.0.0 before 3.53 · source: vendor
FS
FL SWITCH 2008 · Phoenix Contact
0.0.0 before 3.53 · source: vendor
FS
FL SWITCH 2016 · Phoenix Contact
0.0.0 before 3.53 · source: vendor
FS
FL SWITCH 2105 · Phoenix Contact
0.0.0 before 3.53 · source: vendor
FS
FL SWITCH 2108 · Phoenix Contact
0.0.0 before 3.53 · source: vendor
FS
FL SWITCH 2116 · Phoenix Contact
0.0.0 before 3.53 · source: vendor
FS
FL SWITCH 2204-2TC-2SFX · Phoenix Contact
0.0.0 before 3.53 · source: vendor
FS
FL SWITCH 2205 · Phoenix Contact
0.0.0 before 3.53 · source: vendor
FS
FL SWITCH 2206-2FX · Phoenix Contact
0.0.0 before 3.53 · source: vendor
FS
FL SWITCH 2206-2FX SM · Phoenix Contact
0.0.0 before 3.53 · source: vendor
FS
FL SWITCH 2206-2FX SM ST · Phoenix Contact
0.0.0 before 3.53 · source: vendor
FS
FL SWITCH 2206-2FX ST · Phoenix Contact
0.0.0 before 3.53 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-22316
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-22316
certvde.com
https://certvde.com/de/advisories/VDE-2025-104
More from FL SWITCH 2005
7.2
CVE-2026-22317
Command Injection Vulnerability in Root CA Certificate Transfer Workflow
7.1
CVE-2026-22323
Cross‑Site Request Forgery in Link Aggregation Configuration
7.1
CVE-2026-22322
Stored Cross‑Site Scripting in Link Aggregation Name Handling
6.5
CVE-2026-22320
Stack-Based Buffer Overflow in TFTP File-Transfer Command Handling over CLI
5.3
CVE-2026-22321
Stack-Based Buffer Overflow in CLI Login Username Handling over CLI