EUVD-2026-77124
GHSA-cw3c-9w3h-vf4q
Severity by source
AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:L
Adjacent vector confirmed; AC:L because shell metacharacter injection is straightforward; PR:L reflects description's scenario of sub-admin access; C/I/A:H because OS command injection on router yields full control.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
1DescriptionCVE.org
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.
AnalysisAI
Command injection in LB-LINK AC1900_AZ2 router firmware V1.0.2 allows adjacent-network actors to inject OS commands through shell metacharacters passed to the bs_SetLimitCli_info function within libshare.so, triggered via a POST request to /goform/set_LimitClient_cfg. The vulnerability is notable for an internal contradiction: the CVSS vector assigns PR:H (administrative privileges required), yet the description explicitly frames the attack scenario as one where the actor lacks administrative access but can reach the endpoint - suggesting the endpoint may be accessible to lower-privilege or unauthenticated callers in certain deployments. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to be on the adjacent network (LAN or Wi-Fi segment) where the router's HTTP management interface is reachable. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The official CVSS 3.1 score of 3.1 (Low) is driven by AV:A (adjacent network), AC:H (high complexity), and PR:H (high privileges), yielding negligible real-world severity as scored. … 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 has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
More in Ac1900 Firmware
View allA vulnerability was found in LB-LINK AC1900 Router 1.0.2 and classified as critical. Rated medium severity (CVSS 5.3), t
A vulnerability has been found in LB-LINK AC1900 Router 1.0.2 and classified as critical. Rated medium severity (CVSS 5.
A vulnerability, which was classified as critical, was found in LB-LINK AC1900 Router 1.0.2. Rated medium severity (CVSS
Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
View allShare
External POC / Exploit Code
Leaving vuln.today