CVE-2021-26111

MEDIUM

FortiSwitch 6.4.0-6.4.6, 6.2.0-6.2.6, 6.0.0-6.0.6, <=3.6.11 - Use-After-Free via LLDP/CDP/EDP Packets

Title source: llm

Description

A missing release of memory after effective lifetime vulnerability in FortiSwitch 6.4.0 to 6.4.6, 6.2.0 to 6.2.6, 6.0.0 to 6.0.6, 3.6.11 and below may allow an attacker on an adjacent network to exhaust available memory by sending specifically crafted LLDP/CDP/EDP packets to the device.

References (1)

Core 1

Core References

Vendor Advisory x_refsource_confirm

https://fortiguard.com/advisory/FG-IR-21-026

Scores

CVSS v3 6.5

EPSS 0.0011

EPSS Percentile 28.3%

Attack Vector ADJACENT_NETWORK

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-401

Status published

Products (1)

fortinet/fortiswitch < 3.6.11

Published Jun 01, 2021

Tracked Since Feb 18, 2026