LB-LINK AC1900 1.0.2 libshare.so bs_SetLimitCli_info command injection

Summaryinfo

A vulnerability identified as critical has been detected in LB-LINK AC1900 1.0.2. Affected by this issue is the function bs_SetLimitCli_info of the file libshare.so. The manipulation leads to command injection. This vulnerability is traded as CVE-2026-35867. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in LB-LINK AC1900 1.0.2 and classified as critical. This issue affects the function bs_SetLimitCli_info of the file libshare.so. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-35867 since 04/06/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/13/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• LB-LINK

Name

• AC1900

Version

• 1.0.2

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion