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TI-2025-03616 Aliases CVE-2025-4076GHSA-c587-35qx-9wwg

LB-LINK BL-AC3600 Password lighttpd.cgi easy_uci_set_option_string_0 command injection

Priority MEDIUM 57CWE-74Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.19768 97th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LB-LINKBL-AC36001.0.0; 1.0.1; 1.0.2; 1.0.3; 1.0.4; 1.0.5; 1.0.6; 1.0.7; 1.0.8; 1.0.9; 1.0.10; 1.0.11; 1.0.12; 1.0.13; 1.0.14; 1.0.15; 1.0.16; 1.0.17; 1.0.18; 1.0.19; 1.0.20; 1.0.21; 1.0.22—No fix listedCNA
  • BL-AC3600 VendorLB-LINK Affected 1.0.0; 1.0.1; 1.0.2; 1.0.3; 1.0.4; 1.0.5; 1.0.6; 1.0.7; 1.0.8; 1.0.9; 1.0.10; 1.0.11; 1.0.12; 1.0.13; 1.0.14; 1.0.15; 1.0.16; 1.0.17; 1.0.18; 1.0.19; 1.0.20; 1.0.21; 1.0.22 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-4076
  2. 2026-10-03 Alias added: GHSA-c587-35qx-9wwg

References

Exploit 2

  • TI-2023-11781 LB-LINK BL-AC1900_2.0 v1.0.1, LB-LINK BL-WR9000 v2.4.9, LB-LINK BL-X26 v1.2.5, and… CVSS 3.1CRITICAL 9.8
  • TI-2025-20979 An issue in BL-AC2100 V1.0.4 and before allows a remote attacker to execute arbitrary… CVSS 3.1CRITICAL 9.8
  • TI-2025-20978 An issue in BL-AC2100 <=V1.0.4 allows a remote attacker to execute arbitrary code via the… CVSS 3.1CRITICAL 9.8
  • TI-2025-06911 LB-LINK BL-WR9000 Web Interface lighttpd.cgi restore improper authentication CVSS 4.0CRITICAL 9.3
  • TI-2025-35494 The LB-Link BL-CPE300M AX300 4G LTE Router firmware version… CVSS 3.1HIGH 8.8
  • TI-2024-34368 LB-LINK BL-WR 1300H v.1.0.4 contains hardcoded credentials stored in /etc/shadow which are easily guessable. CVSS 3.1CRITICAL 9.8
See all 27 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences