CVE-2026-71926: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in DrayTek Corporation VigorSwitch G2540xs
CVE-2026-71926 is a command injection vulnerability in DrayTek VigorSwitch G2540xs devices. It arises from insufficient sanitization of username, password, and location fields in the setDevice function. A remote attacker with valid administrative credentials can exploit this flaw to execute arbitrary commands with root privileges. The vulnerability affects multiple DrayTek VigorSwitch models. No official patch or remediation guidance is currently confirmed.
AI Analysis
Technical Summary
This vulnerability involves improper neutralization of special elements used in an OS command within the setDevice function of DrayTek VigorSwitch G2540xs. Specifically, the username, password, and location input fields are not properly sanitized before being used in command execution. An attacker who has valid administrative credentials to the device's web management interface can supply crafted input to trigger arbitrary command execution with root privileges. The CVSS 4.0 score is 8.6, indicating a high severity vulnerability with network attack vector, low attack complexity, no user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows an attacker with administrative access to execute arbitrary OS commands as root on the affected device. This can lead to full system compromise, unauthorized control, and potential disruption of network operations managed by the device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, ensure that administrative credentials are tightly controlled and access to the device's web management interface is restricted to trusted personnel only.
CVE-2026-71926: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in DrayTek Corporation VigorSwitch G2540xs
Description
CVE-2026-71926 is a command injection vulnerability in DrayTek VigorSwitch G2540xs devices. It arises from insufficient sanitization of username, password, and location fields in the setDevice function. A remote attacker with valid administrative credentials can exploit this flaw to execute arbitrary commands with root privileges. The vulnerability affects multiple DrayTek VigorSwitch models. No official patch or remediation guidance is currently confirmed.
CVSS v4.0
Score 8.6high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper neutralization of special elements used in an OS command within the setDevice function of DrayTek VigorSwitch G2540xs. Specifically, the username, password, and location input fields are not properly sanitized before being used in command execution. An attacker who has valid administrative credentials to the device's web management interface can supply crafted input to trigger arbitrary command execution with root privileges. The CVSS 4.0 score is 8.6, indicating a high severity vulnerability with network attack vector, low attack complexity, no user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows an attacker with administrative access to execute arbitrary OS commands as root on the affected device. This can lead to full system compromise, unauthorized control, and potential disruption of network operations managed by the device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, ensure that administrative credentials are tightly controlled and access to the device's web management interface is restricted to trusted personnel only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-08T16:37:44.518Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8c7decacd9273b49e1b3d6
Added to database: 08/24/2026, 17:22:52 UTC
Last enriched: 08/24/2026, 17:38:46 UTC
Last updated: 08/24/2026, 22:42:21 UTC
Views: 4
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