CVE-2026-71914: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in DrayTek Corporation VigorAP 918R
Description
Multiple DrayTek VigorAP models contain a command injection vulnerability in the dray_apm component. The vulnerability is caused by insufficient validation of UDP message content after START_SPEED_TEST before command execution. A remote attacker can trigger this vulnerability via a crafted message to execute arbitrary commands with root privileges.
CVSS v4.0
Score 9.3critical
Affected software
DrayTek Corporation
VigorAP 918R
DrayTek Corporation
VigorAP 960C
DrayTek Corporation
VigorAP 1060C
DrayTek Corporation
VigorAP 906
DrayTek Corporation
VigorAP 912C
DrayTek Corporation
VigorAP 903
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects multiple DrayTek VigorAP models, including the VigorAP 918R. The root cause is improper neutralization of special elements in UDP messages processed after the START_SPEED_TEST command, allowing remote attackers to execute arbitrary OS commands with root-level access. The CVSS 4.0 base score is 9.3, reflecting its critical severity and the fact that it requires no privileges or user interaction to exploit. No official patch or remediation guidance has been published by the vendor as of the data provided.
Potential Impact
Successful exploitation allows remote, unauthenticated attackers to execute arbitrary commands on the affected device with root privileges. This can lead to full device compromise, including unauthorized control, data theft, or disruption of network services.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict network access to the affected device's UDP services to trusted sources only to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-08T16:37:44.517Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a8c7de9acd9273b49e1b363
Added to database: 08/24/2026, 17:22:49 UTC
Last enriched: 08/24/2026, 17:52:40 UTC
Last updated: 10/06/2026, 18:48:24 UTC
Views: 52
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