TI-2026-27784 Aliases CVE-2026-35867 GHSA-cw3c-9w3h-vf4q

OS command injection in LB-LINK AC1900 firmware

MEDIUM 48CWE-78Published 2026-09-13 · Updated 2026-09-14

Key facts

Attack vector: Adjacent network
Privileges required: High
User interaction: None
Attack complexity: High
Impact type: Code execution
Confidentiality · integrity · availability: None · Low · Low
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

A Command Injection vulnerability exists in the bs_SetLimitCli_info function within the libshare.so library of the LB-LINK router AC1900_AZ2 V1.0.2 via shell metacharacters, if the device is deployed in a scenario where an actor is able to make a "POST /goform/set_LimitClient_cfg" call but does not already have administrative access to the device.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01017 63rd percentileScored 2026-11-07

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

Vendor	Product	Affected versions	Fixed in	Status	Source
LB-LINK	AC1900 firmware	1.0.2	—	No fix listed	CNA

AC1900 firmware VendorLB-LINK Affected 1.0.2 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-35867
2026-10-03 Alias added: GHSA-cw3c-9w3h-vf4q

References

Other 1

https://github.com/Orcust-Automaton/Vulnerability/blob/main/LB-Link/AC1900_AZ2/bs_SetLimitCli_info.md

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