Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2021-35031

Quick assessment

Affected
Zyxel GS1900 series firmware
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.

Zyxel ZyXEL GS1900是中国台湾合勤（Zyxel）公司的一款管理型交换机。 多款 Zyxel 产品中存在操作系统命令注入漏洞，该漏洞源于产品的TFTP客户端未对可执行系统命令的功能添加权限控制。攻击者可在登陆后通过该漏洞执行任意操作系统命令。以下产品及版本受到影响：Zyxel GS1900系列固件、XGS1210 系列固件、XGS1250系列固件。

CVSS 6.8 · Medium EPSS 0.46% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-35031

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the TFTP client of Zyxel GS1900 series firmware, XGS1210 series firmware, and XGS1250 series firmware, which could allow an authenticated LAN user to execute arbitrary OS commands via the GUI of the vulnerable device.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
ZyXEL GS1900 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zyxel ZyXEL GS1900是中国台湾合勤（Zyxel）公司的一款管理型交换机。 多款 Zyxel 产品中存在操作系统命令注入漏洞，该漏洞源于产品的TFTP客户端未对可执行系统命令的功能添加权限控制。攻击者可在登陆后通过该漏洞执行任意操作系统命令。以下产品及版本受到影响：Zyxel GS1900系列固件、XGS1210 系列固件、XGS1250系列固件。
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
Zyxel GS1900 series firmware 2.60 -
Zyxel XGS1210 series firmware 1.00(ABTY.4)C0 -
Zyxel XGS1250 series firmware 1.00(ABWE.0)C0 -

II. Public POCs for CVE-2021-35031

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-35031

请登录查看更多情报信息。

Other References for CVE-2021-35031 (1)

IV. Related Vulnerabilities

Same product: GS1900 series firmware
Same vendor: Zyxel
Same weakness: CWE-78

V. Comments for CVE-2021-35031

No comments yet

Leave a comment