CVE-2026-7256: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') in Zyxel WRE6505 v2 firmware
CVE-2026-7256 is a high-severity OS command injection vulnerability in the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0. An adjacent attacker on the LAN can exploit this by sending a crafted HTTP request to execute arbitrary OS commands on the device. The vulnerability arises from improper neutralization of special elements used in OS commands (CWE-78). No official patch or remediation guidance is currently available from the vendor. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability involves improper neutralization of special elements in OS commands within the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0, allowing an adjacent LAN attacker to execute arbitrary operating system commands by sending crafted HTTP requests. The CVSS 3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability. The vendor has not published any patch or official remediation guidance as of the current information.
Potential Impact
Successful exploitation allows an attacker with adjacent LAN access to execute arbitrary OS commands on the affected device, potentially leading to full compromise of the device's confidentiality, integrity, and availability. This could disrupt device operation or allow further network attacks originating from the compromised device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict LAN access to trusted users only and monitor for suspicious HTTP requests targeting the device's CGI interface.
CVE-2026-7256: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') in Zyxel WRE6505 v2 firmware
Description
CVE-2026-7256 is a high-severity OS command injection vulnerability in the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0. An adjacent attacker on the LAN can exploit this by sending a crafted HTTP request to execute arbitrary OS commands on the device. The vulnerability arises from improper neutralization of special elements used in OS commands (CWE-78). No official patch or remediation guidance is currently available from the vendor. There are no known exploits in the wild at this time.
CVSS v3.1
Score 8.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper neutralization of special elements in OS commands within the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0, allowing an adjacent LAN attacker to execute arbitrary operating system commands by sending crafted HTTP requests. The CVSS 3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability. The vendor has not published any patch or official remediation guidance as of the current information.
Potential Impact
Successful exploitation allows an attacker with adjacent LAN access to execute arbitrary OS commands on the affected device, potentially leading to full compromise of the device's confidentiality, integrity, and availability. This could disrupt device operation or allow further network attacks originating from the compromised device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict LAN access to trusted users only and monitor for suspicious HTTP requests targeting the device's CGI interface.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Zyxel
- Date Reserved
- 2026-04-28T02:06:55.400Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a02aae4cbff5d86109f4b50
Added to database: 05/12/2026, 04:21:56 UTC
Last enriched: 05/19/2026, 11:06:54 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 94
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