CVE-2025-7673
9.8 · CRITICALOverview
CVE-2025-7673 is a critical-severity vulnerability affecting zyxel emg3525-t50b_firmware. It was published on July 16, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A buffer overflow vulnerability in the URL parser of the zhttpd web server in Zyxel VMG8825-T50K firmware versions prior to V5.50(ABOM.5)C0 could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and potentially execute arbitrary code by sending a specially crafted HTTP request.
Remediation
Check the references section for vendor advisories and patches from zyxel. Update emg3525-t50b_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| zyxel | emg3525-t50b_firmware | >= 0, < 5.50\(abpm.4\)c0 | Affected |
| zyxel | emg5523-t50b_firmware | >= 0, < 5.50\(abpm.4\)c0 | Affected |
| zyxel | emg5723-t50k_firmware | >= 0, < 5.50\(abom.5\)c0 | Affected |
| zyxel | emg6726-b10a_firmware | >= 0, < 5.13\(abnp.6\).c | Affected |
| zyxel | ex3510-b0_firmware | >= 0, < 5.17\(abup.3\)c0 | Affected |
| zyxel | ex5510-b0_firmware | >= 0, < 5.15\(abqx.3\)c0 | Affected |
| zyxel | vmg1312-t20b_firmware | >= 0, < 5.50\(absb.3\)c0 | Affected |
| zyxel | vmg3625-t50b_firmware | >= 0, < 5.50\(abpm.4\)c0 | Affected |
| zyxel | vmg3925-b10b_firmware | >= 0, < 5.13\(aavf.16\)c | Affected |
| zyxel | vmg3925-b10c_firmware | >= 0, < 5.13\(aavf.16\)c | Affected |
Frequently Asked Questions
What is CVE-2025-7673?
CVE-2025-7673 is a critical-severity vulnerability affecting zyxel emg3525-t50b_firmware. It was published on July 16, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2025-7673?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-7673?
Check the references section for vendor advisories and patches from zyxel. Update emg3525-t50b_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-7673?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-7673 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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