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 flaw by sending a crafted HTTP request to execute arbitrary operating system commands on the affected device. This vulnerability allows full compromise of confidentiality, integrity, and availability of the device. No official patch or remediation guidance is currently available from the vendor. The vulnerability is not known to be exploited in the wild at this time.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-7256) affects Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0. It is caused by improper neutralization of special elements in OS commands within a CGI program, classified as CWE-78 (OS command injection). An attacker with access to the local network can send specially crafted HTTP requests to the device, leading to arbitrary OS command execution. The CVSS 3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability. No patch or official remediation has been provided by Zyxel as of the publication date.
Potential Impact
Successful exploitation allows an adjacent attacker on the LAN to execute arbitrary operating system commands on the vulnerable Zyxel device. This can lead to full compromise of the device, including unauthorized access to sensitive information, modification or deletion of data, and disruption of device availability. The vulnerability affects confidentiality, integrity, and availability with high severity.
Mitigation Recommendations
No official patch or remediation guidance is currently available from Zyxel for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, restrict LAN access to trusted users only and monitor network segments to limit exposure.
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 flaw by sending a crafted HTTP request to execute arbitrary operating system commands on the affected device. This vulnerability allows full compromise of confidentiality, integrity, and availability of the device. No official patch or remediation guidance is currently available from the vendor. The vulnerability is not known to be exploited in the wild at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-7256) affects Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0. It is caused by improper neutralization of special elements in OS commands within a CGI program, classified as CWE-78 (OS command injection). An attacker with access to the local network can send specially crafted HTTP requests to the device, leading to arbitrary OS command execution. The CVSS 3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability. No patch or official remediation has been provided by Zyxel as of the publication date.
Potential Impact
Successful exploitation allows an adjacent attacker on the LAN to execute arbitrary operating system commands on the vulnerable Zyxel device. This can lead to full compromise of the device, including unauthorized access to sensitive information, modification or deletion of data, and disruption of device availability. The vulnerability affects confidentiality, integrity, and availability with high severity.
Mitigation Recommendations
No official patch or remediation guidance is currently available from Zyxel for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, restrict LAN access to trusted users only and monitor network segments to limit exposure.
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: 5/12/2026, 4:21:56 AM
Last enriched: 5/12/2026, 4:36:32 AM
Last updated: 5/12/2026, 5:47:46 AM
Views: 4
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