CVE-2026-120241— Ruijie RG-ES205GC Local Firmware Upgrade httpupg.cgi buffer overflow

Quick assessment

Affected

Ruijie RG-ES205GC

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.

在锐捷 RG-ES205GC、RG-ES206GC-P、RG-ES208GC、RG-ES210GC-LP 和 RG-ES210GS-P 设备的 ESW_1.0(1)B1P48 固件中，发现一处安全漏洞。该漏洞影响本地固件升级接口组件中 httpupg.cgi 文件的某个未知功能。攻击者可通过恶意操作触发缓冲区溢出。该漏洞可被远程利用，且利用代码已在公开渠道出现，存在被实际利用的风险。厂商已就此次漏洞披露事宜在早期被联系，但至今未作出任何回应。

CVSS 7.5 · High Updated Nov 02, 2026

Possible ATT&CK Techniques 2 AI

T1068.002 T1190 · Exploit Public-Facing Application

Affected Version Matrix 5

Vendor	Product	Version Range	Status
Ruijie	RG-ES205GC	`ESW_1.0(1)B1P48`	affected
Ruijie	RG-ES206GC-P	`ESW_1.0(1)B1P48`	affected
Ruijie	RG-ES208GC	`ESW_1.0(1)B1P48`	affected
Ruijie	RG-ES210GC-LP	`ESW_1.0(1)B1P48`	affected
Ruijie	RG-ES210GS-P	`ESW_1.0(1)B1P48`	affected

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Vulnerability Information

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Vulnerability Title

Ruijie RG-ES205GC Local Firmware Upgrade httpupg.cgi buffer overflow

Source: CVE Program / CVE List V5

Vulnerability Description

A vulnerability was identified in Ruijie RG-ES205GC, RG-ES206GC-P, RG-ES208GC, RG-ES210GC-LP and RG-ES210GS-P ESW_1.0(1)B1P48. Impacted is an unknown function of the file httpupg.cgi of the component Local Firmware Upgrade Interface. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE
Ruijie	RG-ES205GC	ESW_1.0(1)B1P48	`cpe:2.3:a:ruijie:rg-es205gc::::::::`
Ruijie	RG-ES206GC-P	ESW_1.0(1)B1P48	`cpe:2.3:a:ruijie:rg-es206gc-p::::::::`
Ruijie	RG-ES208GC	ESW_1.0(1)B1P48	`cpe:2.3:a:ruijie:rg-es208gc::::::::`
Ruijie	RG-ES210GC-LP	ESW_1.0(1)B1P48	`cpe:2.3:a:ruijie:rg-es210gc-lp::::::::`
Ruijie	RG-ES210GS-P	ESW_1.0(1)B1P48	`cpe:2.3:a:ruijie:rg-es210gs-p::::::::`