Vulnerability Intelligence Report
CVE-2025-7673
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.
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:0.55%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-120 ↗CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Zyxel | VMG8825-T50K firmware | < V5.50(ABOM.5)C0 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.545%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Zyxel Corporation · Vendor · Taiwan |
| Reserved | 2025-07-15T02:01:55 |
| Published | 2025-07-16T07:11:02 |
| Last Updated | 2026-02-26T17:50:32 |
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