CVE-2026-71914: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in DrayTek Corporation VigorAP 918R
CVE-2026-71914 is a critical OS command injection vulnerability in DrayTek VigorAP 918R devices. It arises from insufficient validation of UDP message content after the START_SPEED_TEST command in the dray_apm component. An unauthenticated remote attacker can exploit this flaw by sending a crafted UDP message, leading to arbitrary command execution with root privileges.
AI Analysis
Technical Summary
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.
CVE-2026-71914: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in DrayTek Corporation VigorAP 918R
Description
CVE-2026-71914 is a critical OS command injection vulnerability in DrayTek VigorAP 918R devices. It arises from insufficient validation of UDP message content after the START_SPEED_TEST command in the dray_apm component. An unauthenticated remote attacker can exploit this flaw by sending a crafted UDP message, leading to arbitrary command execution with root privileges.
CVSS v4.0
Score 9.3critical
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
- Remediation Level
- null
Threat ID: 6a8c7de9acd9273b49e1b363
Added to database: 08/24/2026, 17:22:49 UTC
Last enriched: 08/24/2026, 17:52:40 UTC
Last updated: 08/24/2026, 18:25:59 UTC
Views: 3
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