CVE-2026-35867: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in LB-LINK AC1900 firmware
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.
AI Analysis
Technical Summary
This vulnerability involves improper neutralization of special elements in OS commands (CWE-78) in the LB-LINK AC1900_AZ2 V1.0.2 firmware. Specifically, the bs_SetLimitCli_info function in libshare.so improperly handles shell metacharacters in a POST request to /goform/set_LimitClient_cfg, allowing command injection. An attacker able to send such a request without administrative access could potentially execute commands with limited impact.
Potential Impact
The vulnerability allows limited integrity and availability impact due to command injection, but no confidentiality impact is indicated. The CVSS vector indicates that exploitation requires high attack complexity and privileges, with no user interaction needed. The overall impact is low, with no known exploits in the wild.
Mitigation Recommendations
No vendor advisory or patch information is provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, restrict access to the vulnerable POST endpoint and limit privileges to prevent unauthorized use.
CVE-2026-35867: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in LB-LINK AC1900 firmware
Description
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.
CVSS v3.1
Score 3.1low
Affected software
LB-LINK
AC1900 firmware
pkg:github/orcust-automaton/LB-Link-AC1900_AZ2Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper neutralization of special elements in OS commands (CWE-78) in the LB-LINK AC1900_AZ2 V1.0.2 firmware. Specifically, the bs_SetLimitCli_info function in libshare.so improperly handles shell metacharacters in a POST request to /goform/set_LimitClient_cfg, allowing command injection. An attacker able to send such a request without administrative access could potentially execute commands with limited impact.
Potential Impact
The vulnerability allows limited integrity and availability impact due to command injection, but no confidentiality impact is indicated. The CVSS vector indicates that exploitation requires high attack complexity and privileges, with no user interaction needed. The overall impact is low, with no known exploits in the wild.
Mitigation Recommendations
No vendor advisory or patch information is provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, restrict access to the vulnerable POST endpoint and limit privileges to prevent unauthorized use.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-04-06T00:00:00.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa719e655bf5e2cf51b8e3c
Added to database: 09/13/2026, 21:47:18 UTC
Last enriched: 09/13/2026, 22:01:28 UTC
Last updated: 09/14/2026, 04:01:23 UTC
Views: 9
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