{"id":"CVE-2025-7673","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-7673","generatedAt":"2026-10-28T01:19:23.007Z","title":"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…","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.","published":"2025-07-16T07:15:24.000Z","lastModified":"2026-06-17T10:05:27.000Z","status":"Analyzed","sourceIdentifier":"security@zyxel.com.tw","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-120"],"affected":["zyxel/emg3525-t50b firmware","zyxel/emg5523-t50b firmware","zyxel/emg5723-t50k firmware","zyxel/emg6726-b10a firmware","zyxel/ex3510-b0 firmware","zyxel/ex5510-b0 firmware","zyxel/vmg1312-t20b firmware","zyxel/vmg3625-t50b firmware","zyxel/vmg3925-b10b firmware","zyxel/vmg3925-b10c firmware","zyxel/vmg3927-b50a firmware","zyxel/vmg3927-b60a firmware","zyxel/vmg3927-b50b firmware","zyxel/vmg3927-t50k firmware","zyxel/vmg4005-b50b firmware","zyxel/vmg4927-b50a firmware","zyxel/vmg8623-t50b firmware","zyxel/vmg8825-b50a firmware","zyxel/vmg8825-b60a firmware","zyxel/vmg8825-bx0b firmware","zyxel/vmg8825-t50k firmware","zyxel/vmg8924-b10d firmware","zyxel/xmg3927-b50a firmware","zyxel/xmg8825-b50a firmware"],"epss":{"score":0.00652,"percentile":0.50975,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.65%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://www.zyxel.com/service-provider/global/en/zyxel-security-advisory-remote-code-execution-and-denial-service-vulnerabilities-cpe","tags":["Vendor Advisory"],"source":"security@zyxel.com.tw"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-7673","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}