CVE-2026-6952
Received Received - Intake

Authenticated Command Injection in Zyxel AX7501-B1 Firmware

Publication date: 2026-07-21

Last updated on: 2026-07-21

Assigner: Zyxel Corporation

Description
A post-authentication command injection vulnerability in the "LogServer" field of the syslog component in Zyxel AX7501-B1 firmware versions through 5.17(ABPC.7.2)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device.

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Meta Information

Published
2026-07-21
Last Modified
2026-07-21
Generated
2026-07-21
AI Q&A
2026-07-21
EPSS Evaluated
N/A
NVD
CVE-2026-6952
EUVD
EUVD-2026-46145

Affected Vendors & Products

Showing 13 associated CPEs
Vendor Product Version / Range
zyxel ax7501-b1 5.17(ABPC.7.2)C0
zyxel dx *
zyxel ee *
zyxel emg *
zyxel ex *
zyxel gm *
zyxel vmg *
zyxel am *
zyxel pe *
zyxel pm *
zyxel px *
zyxel we *
zyxel wx *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

This is a post-authentication command injection vulnerability in the LogServer field of the syslog component in Zyxel AX7501-B1 firmware versions through 5.17(ABPC.7.2)C0. An authenticated attacker with administrator privileges can exploit this to execute arbitrary OS commands on affected devices.

Detection Guidance

This vulnerability requires authentication and administrator privileges to exploit. Detection involves checking firmware versions and syslog configurations. Review device logs for suspicious command execution attempts in the LogServer field. Verify if WAN access is enabled and if user-configured passwords are weak or compromised.

Impact Analysis

An attacker could gain control over your device, execute malicious commands, and potentially compromise network security. The attack requires compromised user-configured passwords and administrator privileges.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by allowing unauthorized command execution on affected devices. If exploited, it may lead to unauthorized access to sensitive data, compromising confidentiality and integrity requirements under these regulations. The post-authentication nature and need for admin privileges reduce but do not eliminate this risk.

Mitigation Strategies

Immediately update affected devices to the latest patched firmware versions provided by Zyxel. Ensure WAN access is disabled by default. Strengthen user-configured passwords and monitor for unauthorized access. Contact Zyxel support if using customized models or ISP-provided devices.

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