CVE-2026-6837: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') in Zyxel WAX650S firmware
CVE-2026-6837 is a post-authentication OS command injection vulnerability in the export-cgi CGI program of Zyxel WAX650S firmware up to version 7.10(ABRM.4)C0. An attacker with administrator privileges could exploit this flaw to execute arbitrary OS commands on the device. The vulnerability has a high severity rating with a CVSS score of 7.2. No official patch or remediation guidance is currently provided by the vendor.
AI Analysis
Technical Summary
This vulnerability involves improper neutralization of special elements used in OS commands (CWE-78) within the export-cgi CGI program of Zyxel WAX650S firmware. It allows an authenticated attacker with administrator privileges to execute arbitrary OS commands on the affected device. The affected versions include firmware versions through 7.10(ABRM.4)C0. The CVSS v3.1 base score is 7.2, reflecting network attack vector, low attack complexity, high privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. No known exploits in the wild have been reported, and no vendor remediation or patch information is currently available.
Potential Impact
Successful exploitation could lead to full compromise of the affected device, including unauthorized command execution with administrator privileges. This could result in complete loss of confidentiality, integrity, and availability of the device and its data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict administrative access to trusted users only and monitor for suspicious activity. No vendor-provided mitigation or temporary fix is currently documented.
CVE-2026-6837: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') in Zyxel WAX650S firmware
Description
CVE-2026-6837 is a post-authentication OS command injection vulnerability in the export-cgi CGI program of Zyxel WAX650S firmware up to version 7.10(ABRM.4)C0. An attacker with administrator privileges could exploit this flaw to execute arbitrary OS commands on the device. The vulnerability has a high severity rating with a CVSS score of 7.2. No official patch or remediation guidance is currently provided by the vendor.
CVSS v3.1
Score 7.2high
Affected software
Zyxel
WAX650S firmware
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper neutralization of special elements used in OS commands (CWE-78) within the export-cgi CGI program of Zyxel WAX650S firmware. It allows an authenticated attacker with administrator privileges to execute arbitrary OS commands on the affected device. The affected versions include firmware versions through 7.10(ABRM.4)C0. The CVSS v3.1 base score is 7.2, reflecting network attack vector, low attack complexity, high privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. No known exploits in the wild have been reported, and no vendor remediation or patch information is currently available.
Potential Impact
Successful exploitation could lead to full compromise of the affected device, including unauthorized command execution with administrator privileges. This could result in complete loss of confidentiality, integrity, and availability of the device and its data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict administrative access to trusted users only and monitor for suspicious activity. No vendor-provided mitigation or temporary fix is currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Zyxel
- Date Reserved
- 2026-04-22T03:09:29.255Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a71e167bf8831d539d34e3b
Added to database: 08/04/2026, 12:56:07 UTC
Last enriched: 08/11/2026, 18:03:29 UTC
Last updated: 09/17/2026, 22:01:37 UTC
Views: 77
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.