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CVE-2021-26111

Quick assessment

Affected
Fortinet Fortinet FortiSwitch
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fortinet FortiSwitch是美国飞塔（Fortinet）公司的一款交换机产品，它最大的优点是可以由防火墙统一管理,在一个窗口下就可以用图形界面管理整个局域网络。 FortiSwitch 6.4.0 - 6.4.6, 6.2.0 - 6.2.6, 6.0.0 - 6.0.6, 3.6.11及以下版本存在资源管理错误漏洞，该漏洞源于存在一个缺失释放内存的漏洞，可能会让相邻网络上的攻击者通过向设备发送专门设计的LLDP/CDP/EDP包来耗尽可用内存。。

CVSS 6.5 · Medium EPSS 0.38% · P31

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-26111

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Fortinet FortiSwitch 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fortinet FortiSwitch是美国飞塔（Fortinet）公司的一款交换机产品，它最大的优点是可以由防火墙统一管理,在一个窗口下就可以用图形界面管理整个局域网络。 FortiSwitch 6.4.0 - 6.4.6, 6.2.0 - 6.2.6, 6.0.0 - 6.0.6, 3.6.11及以下版本存在资源管理错误漏洞，该漏洞源于存在一个缺失释放内存的漏洞，可能会让相邻网络上的攻击者通过向设备发送专门设计的LLDP/CDP/EDP包来耗尽可用内存。。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Fortinet Fortinet FortiSwitch 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 -

II. Public POCs for CVE-2021-26111

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III. Intelligence Information for CVE-2021-26111

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Vendor Advisories for CVE-2021-26111 (1)

IV. Related Vulnerabilities

Same product: Fortinet FortiSwitch
Same vendor: Fortinet

V. Comments for CVE-2021-26111

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