EUVD-2026-67255
GHSA-6j4v-cp8h-4qcw
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-reachable command injection with full RCE impact, but the affected client-limit feature is administrative, so PR:L is chosen over PR:N pending confirmation of unauthenticated access.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
A Command Injection vulnerability exists in the bs_SetLimitCli_info function within the libshare.so library of LB-link Router AC2100_AZ3 V1.0.4. This flaw occurs due to insufficient validation and sanitization of user-supplied input before it is passed to a system-level command execution context. An attacker can exploit this vulnerability by injecting specially crafted shell metacharacters or payloads into the vulnerable parameter, resulting in the execution of arbitrary operating system commands.
AnalysisAI
Command injection in the LB-Link AC2100_AZ3 (V1.0.4) router allows attackers to run arbitrary operating-system commands by supplying shell metacharacters to the bs_SetLimitCli_info function in the libshare.so library, which passes unsanitized input into a system-level command context. Successful exploitation yields full compromise (confidentiality, integrity, availability) of the device, typically at elevated/root privilege given the embedded-Linux design. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the ability to send input to the client-limit configuration function (bs_SetLimitCli_info) exposed by the router's management/back-end interface on an AC2100_AZ3 running firmware V1.0.4, and injection of shell metacharacters into the affected parameter. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are mixed. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch is identified at time of analysis; LB-Link had not published a fixed firmware version in the provided sources, so upgrade guidance cannot cite an exact release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit network infrastructure to identify all LB-Link AC2100_AZ3 V1.0.4 devices in production and assess their network criticality. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
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Same weakness CWE-20 – Improper Input Validation
View allSame technique Command Injection
View allShare
External POC / Exploit Code
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