SB2026101472 - Multiple vulnerabilities in DrayTek VigorSwitch devices

Description

This security bulletin contains information about 7 vulnerabilities.

1) Buffer overflow (CVE-ID: CVE-2026-52497)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A remote user can trigger memory corruption and execute arbitrary code on the target system.

2) Buffer overflow (CVE-ID: CVE-2026-52498)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A remote user can trigger memory corruption and execute arbitrary code on the target system.

3) OS Command injection (CVE-ID: CVE-2026-52499)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to escalate privileges on the device.

The vulnerability exists due to improper input validation. A remote user can pass specially crafted data to the management interface and execute arbitrary OS commands on the target system.

4) OS Command injection (CVE-ID: CVE-2026-52500)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to escalate privileges on the device.

The vulnerability exists due to improper input validation. A remote user can pass specially crafted data to the management interface and execute arbitrary OS commands on the target system.

5) Buffer overflow (CVE-ID: CVE-2026-52501)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A remote user can trigger memory corruption and execute arbitrary code on the target system.

6) Buffer overflow (CVE-ID: CVE-2026-52502)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A remote user can trigger memory corruption and execute arbitrary code on the target system.

7) OS Command injection (CVE-ID: CVE-2026-52503)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to escalate privileges on the device.

The vulnerability exists due to improper input validation. A remote user can pass specially crafted data to the management interface and execute arbitrary OS commands on the target system.

Remediation

Install update from vendor's website.

References

• https://www.draytek.com/about/security-advisory/multiple-remote-code-execution-and-buffer-overflow-vulnerabilities-july-2026