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CVE-2026-19971— LB-Link WR1210M Backup Endpoint backup.cgi main missing authentication

Quick assessment

Affected
LB-Link WR1210M
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.

LB-LINK WR1210M是中国LB-LINK公司的一款路由器。 LB-LINK WR1210M 1.0.3版本存在授权问题漏洞，该漏洞源于Backup Endpoint组件中/www/cgi-bin/backup.cgi文件的main函数缺少身份验证，可能导致本地网络攻击者进行未授权访问。

CVSS 4.7 · Medium EPSS 0.42% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
LB-Link WR1210M 1.0.3 affected
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I. Basic Information for CVE-2026-19971

Vulnerability Information
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Vulnerability Title
LB-Link WR1210M Backup Endpoint backup.cgi main missing authentication
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in LB-Link WR1210M 1.0.3. This impacts the function main of the file /www/cgi-bin/backup.cgi of the component Backup Endpoint. This manipulation causes missing authentication. The attack is only possible within the local network. 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:A/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
LB-LINK WR1210M 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LB-LINK WR1210M是中国LB-LINK公司的一款路由器。 LB-LINK WR1210M 1.0.3版本存在授权问题漏洞，该漏洞源于Backup Endpoint组件中/www/cgi-bin/backup.cgi文件的main函数缺少身份验证，可能导致本地网络攻击者进行未授权访问。
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
LB-Link WR1210M 1.0.3 cpe:2.3:a:lb-link:wr1210m:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-19971

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III. Intelligence Information for CVE-2026-19971

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Vendor Advisories for CVE-2026-19971 (1)

Other References for CVE-2026-19971 (2)

IV. Related Vulnerabilities

Same vendor: LB-Link
Same weakness: CWE-306

V. Comments for CVE-2026-19971

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