Description
A vulnerability was identified in LB-LINK X-PRO 1.0.22-20231206. The impacted element is an unknown function of the file /etc/shadow. The manipulation leads to hard-coded credentials. It is possible to initiate the attack remotely. A high degree of complexity is needed for the attack. The exploitability is regarded as difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| LB-LINK | X-PRO | 1.0.22-20231206 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
on3sk-0x1/cve-2026-19900-PoC ★ 0 · Sep 4, 2026
cve-2026-19900-PoC
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- LB-LINK Routers - Unauthenticated Command Injection http/cves/2026/CVE-2026-19900.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
References
- VDB-390090 | LB-LINK X-PRO shadow hard-coded credentials vdb-entry
- VDB-390090 | CTI Indicators (IOB, IOC, TTP, IOA) signature permissions-required
- CVE-2026-19900 | CVE Analysis and Report third-party-advisory
- Submit #870712 | LB-LINK(深圳必联电子) Router B-Link AC1200 X-PRO(AC6)_Dual_V1.0.22-20231206 Hardcoded Credentials third-party-advisory
- https://github.com/DavCloudz/cve/blob/main/B-Link/B-Link%20AC1200%20X-PRO(AC6)%20Hardcoded%20Credentials%20Vulnerability.md exploit