CVE-2025-4076
LB-LINK BL-AC3600 Password lighttpd.cgi easy_uci_set_option_string_0 command injection
Severity Score
5.3
*CVSS v4
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
2
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Track*
*SSVC
Descriptions
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.
Es wurde eine Schwachstelle in LB-LINK BL-AC3600 bis 1.0.22 entdeckt. Sie wurde als kritisch eingestuft. Dabei betrifft es die Funktion easy_uci_set_option_string_0 der Datei /cgi-bin/lighttpd.cgi der Komponente Password Handler. Durch das Beeinflussen des Arguments routepwd mit unbekannten Daten kann eine command injection-Schwachstelle ausgenutzt werden. Die Umsetzung des Angriffs kann dabei über das Netzwerk erfolgen. Der Exploit steht zur öffentlichen Verfügung.
*Credits:
Gray
CVSS Scores
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
System
Vulnerable | Subsequent
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Track*
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2025-04-29 CVE Reserved
- 2025-04-29 CVE Published
- 2025-04-29 CVE Updated
- 2025-04-29 First Exploit
- 2025-07-06 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
- CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
CAPEC
References (4)
| URL | Tag | Source |
|---|---|---|
| https://vuldb.com/?id.306513 | Vdb Entry | |
| https://vuldb.com/?submit.560232 | Third Party Advisory |
| URL | Date | SRC |
|---|---|---|
| https://github.com/GrayLxton/BLink_poc | 2025-04-29 | |
| https://github.com/GrayLxton/BLink_poc/blob/main/poc.py | 2025-04-29 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.0 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.0" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.1 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.1" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.2 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.2" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.3 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.3" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.4 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.4" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.5 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.5" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.6 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.6" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.7 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.7" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.8 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.8" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.9 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.9" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.10 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.10" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.11 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.11" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.12 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.12" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.13 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.13" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.14 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.14" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.15 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.15" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.16 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.16" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.17 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.17" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.18 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.18" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.19 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.19" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.20 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.20" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.21 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.21" | en |
Affected
| ||||||
| LB-LINK Search vendor "LB-LINK" | BL-AC3600 Search vendor "LB-LINK" for product "BL-AC3600" | 1.0.22 Search vendor "LB-LINK" for product "BL-AC3600" and version "1.0.22" | en |
Affected
| ||||||