Buffer Overflow Exploit in CLI TFTP Command of Affected Product by Vendor
CVE-2026-22320

6.5MEDIUM

Key Information:

Vendor

Phoenix Contact

Status
Fl Switch 2005
Fl Switch 2008
Fl Switch 2016
Fl Switch 2105
Vendor
CVE Published:
18 March 2026

What is CVE-2026-22320?

A stack-based buffer overflow has been identified in the command handling of the TFTP file-transfer function within the CLI. This flaw allows a low-privileged attacker with Telnet/SSH access to exploit the system by supplying oversized or unexpected filename inputs. Successful exploitation could lead to memory corruption, rendering both the CLI and the web dashboard unavailable, ultimately resulting in a denial of service.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

FL NAT 2008 0.0.0 < 3.53

FL NAT 2208 0.0.0 < 3.53

FL NAT 2304-2GC-2SFP 0.0.0 < 3.53

References

https://certvde.com/de/advisories/VDE-2025-104

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Gabriele Quagliarella from Nozomi Networks
JSON
.