CVE-2026-22320

Stack-Based Buffer Overflow in TFTP File-Transfer Command Handling over CLI

MEDIUM
6.5
CVSS Score
Published: March 18, 2026 at 07:34 AM UTC
Updated: June 17, 2026 at 10:19 AM UTC
77 products affected across 1 vendorFl Switch 2308 Pn FirmwareFl Switch 2314-2sfp Pn FirmwareFl Switch 2206-2fx Firmware

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

0.0.0 ≤ v < 3.530.0.0
Affected range stops below 3.53, so it looks safe — our inference, not a vendor statement
0.0.0 ≤ v < 3.530.0.0
Affected range stops below 3.53, so it looks safe — our inference, not a vendor statement
0.0.0 ≤ v < 3.530.0.0
Affected range stops below 3.53, so it looks safe — our inference, not a vendor statement
0.0.0 ≤ v < 3.530.0.0
Affected range stops below 3.53, so it looks safe — our inference, not a vendor statement
0.0.0 ≤ v < 3.530.0.0
Affected range stops below 3.53, so it looks safe — our inference, not a vendor statement
0.0.0 ≤ v < 3.530.0.0
Affected range stops below 3.53, so it looks safe — our inference, not a vendor statement
0.0.0 ≤ v < 3.530.0.0
Affected range stops below 3.53, so it looks safe — our inference, not a vendor statement
0.0.0 ≤ v < 3.530.0.0
Affected range stops below 3.53, so it looks safe — our inference, not a vendor statement
0.0.0 ≤ v < 3.530.0.0
Affected range stops below 3.53, so it looks safe — our inference, not a vendor statement
0.0.0 ≤ v < 3.530.0.0
Affected range stops below 3.53, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCERTVDE
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-121

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