# CVE-2026-35869: LB-Link AC450M command injection in libshare.so

Source: https://junglewise.ai/threats/cve-2026-35869-lb-link-ac450m-command-injection-in-libshare-so  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-27. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-35869 · Severity: critical · CVSS 9.8 · Published 2026-08-27

The LB-Link AC450M router contains a command injection flaw in its web-based administration interface. An attacker can inject arbitrary shell commands through the device's configuration functions, potentially gaining complete control of the router and any networks it protects. This could lead to data theft, network compromise, or service disruption.

Vendors: [LB-Link](https://junglewise.ai/threats/vendors/lb-link).

## Quick answers

**Is CVE-2026-35869 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-35869 being exploited in the wild.

**How severe is CVE-2026-35869?** Critical severity, with a CVSS score of 9.8, published 27 August 2026.

**Which products and versions are affected?** LB-Link AC450M V4.0.0.

**Is there a fix for CVE-2026-35869?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-35869 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2026-35869?** Check whether you run LB-Link AC450M at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A command injection vulnerability exists in the bs_SetLimitCli_info function within libshare.so, triggered via the /goform/set_LimitClient_cfg endpoint in the GoAhead web server. The vulnerability stems from insufficient validation and sanitization of user-supplied input (mac, time1, time2 parameters) before OS command execution. An attacker can inject shell metacharacters or payloads through these parameters to execute arbitrary OS commands with router privileges. No authentication bypass is required beyond access to the web interface; this can be exploited remotely if the administration interface is exposed, or locally from the network. Patches or mitigations have not been confirmed as available at the time of this advisory.

## Affected products

- LB-Link AC450M V4.0.0

## Timeline

- 2026-08-27: disclosed: Vulnerability disclosed via GitHub and NVD

## References

- [https://github.com/Orcust-Automaton/Vulnerability/blob/main/LB-Link/AC450M/bs_SetLimitCli_info.md](https://github.com/Orcust-Automaton/Vulnerability/blob/main/LB-Link/AC450M/bs_SetLimitCli_info.md)