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CVE-2025-7574— LB-LINK BL-WR9000 Web Interface lighttpd.cgi restore improper authentication

Quick assessment

Affected
LB-LINK BL-AC1900
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LB-LINK BL-AC1900等都是中国必联（LB-LINK）公司的产品。LB-LINK BL-AC1900是一款无线路由器。LB-LINK BL-AC2100是一款无线 Wi-Fi 6 路由器。LB-LINK BL-AC3600是一款双频千兆无线路由器，支持2.4GHz和5GHz频段，适用于家庭和小型办公室网络。 LB-LINK多款产品存在安全漏洞，该漏洞源于文件/cgi-bin/lighttpd.cgi中函数reboot/restore的错误操作导致身份验证不当。以下产品及版本受到影响：BL-AC

CVSS 9.8 · Critical EPSS 0.83% · P57

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-7574

Vulnerability Information
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Vulnerability Title
LB-LINK BL-WR9000 Web Interface lighttpd.cgi restore improper authentication
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability, which was classified as critical, was found in LB-LINK BL-AC1900, BL-AC2100_AZ3, BL-AC3600, BL-AX1800, BL-AX5400P and BL-WR9000 up to 20250702. Affected is the function reboot/restore of the file /cgi-bin/lighttpd.cgi of the component Web Interface. The manipulation leads to improper authentication. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may 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:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
LB-LINK多款产品 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LB-LINK BL-AC1900等都是中国必联（LB-LINK）公司的产品。LB-LINK BL-AC1900是一款无线路由器。LB-LINK BL-AC2100是一款无线 Wi-Fi 6 路由器。LB-LINK BL-AC3600是一款双频千兆无线路由器，支持2.4GHz和5GHz频段，适用于家庭和小型办公室网络。 LB-LINK多款产品存在安全漏洞，该漏洞源于文件/cgi-bin/lighttpd.cgi中函数reboot/restore的错误操作导致身份验证不当。以下产品及版本受到影响：BL-AC
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
LB-LINK BL-AC1900 20250702 -
LB-LINK BL-AC2100_AZ3 20250702 -
LB-LINK BL-AC3600 20250702 -
LB-LINK BL-AX1800 20250702 -
LB-LINK BL-AX5400P 20250702 -
LB-LINK BL-WR9000 20250702 -

II. Public POCs for CVE-2025-7574

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8779 chars
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III. Intelligence Information for CVE-2025-7574

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Proof of Concept for CVE-2025-7574 (1)

News Coverage for CVE-2025-7574 (1)

Same Patch Batch · LB-LINK · 2025-07-14 · 5 CVEs total

CVE-2025-7564 7.8 HIGH LB-LINK BL-AC3600 shadow hard-coded credentials
CVE-2025-7565 5.3 MEDIUM LB-LINK BL-AC3600 Web Management Interface lighttpd.cgi geteasycfg information disclosure
CVE-2025-7573 5.3 MEDIUM LB-LINK BL-WR9000 lighttpd.cgi bs_GetManPwd information disclosure
CVE-2025-7572 5.3 MEDIUM LB-LINK BL-WR9000 lighttpd.cgi bs_GetHostInfo information disclosure

IV. Related Vulnerabilities

Same product: BL-AC1900
Same vendor: LB-LINK
Same weakness: CWE-287

V. Comments for CVE-2025-7574

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