# CVE-2026-35867 — LB-LINK AC1900 firmware

> As of 2026-09-14, CVE-2026-35867 is a LOW-severity vulnerability in LB-LINK AC1900 firmware, CVSS v3.1 3.1, EPSS 0.5% (42.6th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-35867 as of 2026-09-14; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-14

## What is CVE-2026-35867?

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 record classifies CVE-2026-35867 under weakness class [CWE-78](https://intel.threadlinqs.com/cwe/CWE-78). Its CVSS v3 base vector states that the flaw is reachable from an adjacent network, needs high-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 22 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 3.1 — LOW (`CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:L`)
- **EPSS (FIRST):** 0.5% probability of exploitation in the next 30 days, higher than 42.6% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.3/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-13, last modified 2026-09-14

## Is CVE-2026-35867 being exploited?

It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **LB-LINK**: AC1900 firmware

## How to fix CVE-2026-35867

No vendor patch reference has been recorded for CVE-2026-35867 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-35867

No threat campaign in the Threadlinqs corpus currently references CVE-2026-35867, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-09-14. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

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

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-35867
Full detection coverage and IOCs for threats exploiting CVE-2026-35867 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp