What’s Vulnerable › Vulnerabilities

CVE-2025-4076: LB-LINK BL-AC3600 Password lighttpd.cgi easy_uci_set_option_string_0 command injection

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 19.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-29 · updated 2026-06-17
• Weakness: CWE-74

Description

A vulnerability classified as critical has been found in LB-LINK BL-AC3600 up to 1.0.22. This affects the function easy_uci_set_option_string_0 of the file /cgi-bin/lighttpd.cgi of the component Password Handler. The manipulation of the argument routepwd leads to command injection. It is possible to initiate 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.

Affected products

• LB-LINK BL-AC3600: 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5 (+17)

References

• https://github.com/GrayLxton/BLink_poc
• https://github.com/GrayLxton/BLink_poc/blob/main/poc.py
• https://vuldb.com/?ctiid.306513
• https://vuldb.com/?id.306513
• https://vuldb.com/?submit.560232

Get alerted when CVE-2025-4076 or the next vulnerability affects your stack