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CVE-2025-7673 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://www.zyxel.com/service-provider/global/en/zyxel-security-advisory-remote-code-execution-and-denial-service-vulnerabilities-cpe	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-120	Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')	[email protected]

Affected Products

Product	Versions
zyxel emg3525-t50b firmware	< 5.50\(abpm.4\)c0 < 5.50\(absl.0\)b8
CPE cpe:2.3:o:zyxel:emg3525-t50b_firmware:::::emea:::* cpe:2.3:o:zyxel:emg3525-t50b_firmware:::::america:::* Remediation No remediation found in references.
zyxel emg3525-t50b	All versions
CPE cpe:2.3:h:zyxel:emg3525-t50b:-:::::::* Remediation No remediation found in references.
zyxel emg5523-t50b firmware	< 5.50\(abpm.4\)c0 < 5.50\(absl.0\)b8
CPE cpe:2.3:o:zyxel:emg5523-t50b_firmware:::::emea:::* cpe:2.3:o:zyxel:emg5523-t50b_firmware:::::america:::* Remediation No remediation found in references.
zyxel emg5523-t50b	All versions
CPE cpe:2.3:h:zyxel:emg5523-t50b:-:::::::* Remediation No remediation found in references.
zyxel emg5723-t50k firmware	< 5.50\(abom.5\)c0
CPE cpe:2.3:o:zyxel:emg5723-t50k_firmware:::::::: Remediation No remediation found in references.
zyxel emg5723-t50k	All versions
CPE cpe:2.3:h:zyxel:emg5723-t50k:-:::::::* Remediation No remediation found in references.
zyxel emg6726-b10a firmware	< 5.13\(abnp.6\).c
CPE cpe:2.3:o:zyxel:emg6726-b10a_firmware:::::::: Remediation No remediation found in references.
zyxel emg6726-b10a	All versions
CPE cpe:2.3:h:zyxel:emg6726-b10a:-:::::::* Remediation No remediation found in references.
zyxel ex3510-b0 firmware	< 5.17\(abup.3\)c0
CPE cpe:2.3:o:zyxel:ex3510-b0_firmware:::::::: Remediation No remediation found in references.
zyxel ex3510-b0	All versions
CPE cpe:2.3:h:zyxel:ex3510-b0:-:::::::* Remediation No remediation found in references.
zyxel ex5510-b0 firmware	< 5.15\(abqx.3\)c0
CPE cpe:2.3:o:zyxel:ex5510-b0_firmware:::::::: Remediation No remediation found in references.
zyxel ex5510-b0	All versions
CPE cpe:2.3:h:zyxel:ex5510-b0:-:::::::* Remediation No remediation found in references.
zyxel vmg1312-t20b firmware	< 5.50\(absb.3\)c0
CPE cpe:2.3:o:zyxel:vmg1312-t20b_firmware:::::::: Remediation No remediation found in references.
zyxel vmg1312-t20b	All versions
CPE cpe:2.3:h:zyxel:vmg1312-t20b:-:::::::* Remediation No remediation found in references.
zyxel vmg3625-t50b firmware	< 5.50\(abpm.4\)c0
CPE cpe:2.3:o:zyxel:vmg3625-t50b_firmware:::::::: Remediation No remediation found in references.
zyxel vmg3625-t50b	All versions
CPE cpe:2.3:h:zyxel:vmg3625-t50b:-:::::::* Remediation No remediation found in references.
zyxel vmg3925-b10b firmware	< 5.13\(aavf.16\)c
CPE cpe:2.3:o:zyxel:vmg3925-b10b_firmware:::::::: Remediation No remediation found in references.
zyxel vmg3925-b10b	All versions
CPE cpe:2.3:h:zyxel:vmg3925-b10b:-:::::::* Remediation No remediation found in references.
zyxel vmg3925-b10c firmware	< 5.13\(aavf.16\)c
CPE cpe:2.3:o:zyxel:vmg3925-b10c_firmware:::::::: Remediation No remediation found in references.
zyxel vmg3925-b10c	All versions
CPE cpe:2.3:h:zyxel:vmg3925-b10c:-:::::::* Remediation No remediation found in references.
zyxel vmg3927-b50a firmware	< 5.15\(abmt.5\)c0
CPE cpe:2.3:o:zyxel:vmg3927-b50a_firmware:::::::: Remediation No remediation found in references.
zyxel vmg3927-b50a	All versions
CPE cpe:2.3:h:zyxel:vmg3927-b50a:-:::::::* Remediation No remediation found in references.
zyxel vmg3927-b60a firmware	< 5.15\(abmt.5\)c0
CPE cpe:2.3:o:zyxel:vmg3927-b60a_firmware:::::::: Remediation No remediation found in references.
zyxel vmg3927-b60a	All versions
CPE cpe:2.3:h:zyxel:vmg3927-b60a:-:::::::* Remediation No remediation found in references.
zyxel vmg3927-b50b firmware	< 5.13\(ably.6\)c0
CPE cpe:2.3:o:zyxel:vmg3927-b50b_firmware:::::::: Remediation No remediation found in references.
zyxel vmg3927-b50b	All versions
CPE cpe:2.3:h:zyxel:vmg3927-b50b:-:::::::* Remediation No remediation found in references.
zyxel vmg3927-t50k firmware	< 5.50\(abom.5\)c0
CPE cpe:2.3:o:zyxel:vmg3927-t50k_firmware:::::::: Remediation No remediation found in references.
zyxel vmg3927-t50k	All versions
CPE cpe:2.3:h:zyxel:vmg3927-t50k:-:::::::* Remediation No remediation found in references.
zyxel vmg4005-b50b firmware	< 5.13\(abrl.5\)c0
CPE cpe:2.3:o:zyxel:vmg4005-b50b_firmware:::::::: Remediation No remediation found in references.
zyxel vmg4005-b50b	All versions
CPE cpe:2.3:h:zyxel:vmg4005-b50b:-:::::::* Remediation No remediation found in references.
zyxel vmg4927-b50a firmware	< 5.13\(ably.6\)c0
CPE cpe:2.3:o:zyxel:vmg4927-b50a_firmware:::::::: Remediation No remediation found in references.
zyxel vmg4927-b50a	All versions
CPE cpe:2.3:h:zyxel:vmg4927-b50a:-:::::::* Remediation No remediation found in references.
zyxel vmg8623-t50b firmware	< 5.50\(abpm.4\)c0
CPE cpe:2.3:o:zyxel:vmg8623-t50b_firmware:::::::: Remediation No remediation found in references.
zyxel vmg8623-t50b	All versions
CPE cpe:2.3:h:zyxel:vmg8623-t50b:-:::::::* Remediation No remediation found in references.
zyxel vmg8825-b50a firmware	< 5.15\(abmt.5\)c0
CPE cpe:2.3:o:zyxel:vmg8825-b50a_firmware:::::::: Remediation No remediation found in references.
zyxel vmg8825-b50a	All versions
CPE cpe:2.3:h:zyxel:vmg8825-b50a:-:::::::* Remediation No remediation found in references.
zyxel vmg8825-b60a firmware	< 5.15\(abmt.5\)c0
CPE cpe:2.3:o:zyxel:vmg8825-b60a_firmware:::::::: Remediation No remediation found in references.
zyxel vmg8825-b60a	All versions
CPE cpe:2.3:h:zyxel:vmg8825-b60a:-:::::::* Remediation No remediation found in references.
zyxel vmg8825-bx0b firmware	< 5.17\(abny.5\)c0
CPE cpe:2.3:o:zyxel:vmg8825-bx0b_firmware:::::::: Remediation No remediation found in references.
zyxel vmg8825-bx0b	All versions
CPE cpe:2.3:h:zyxel:vmg8825-bx0b:-:::::::* Remediation No remediation found in references.
zyxel vmg8825-t50k firmware	< 5.50\(abom.5\)c0
CPE cpe:2.3:o:zyxel:vmg8825-t50k_firmware:::::::: Remediation No remediation found in references.
zyxel vmg8825-t50k	All versions
CPE cpe:2.3:h:zyxel:vmg8825-t50k:-:::::::* Remediation No remediation found in references.
zyxel vmg8924-b10d firmware	< 5.13\(abgq.6\)c0
CPE cpe:2.3:o:zyxel:vmg8924-b10d_firmware:::::::: Remediation No remediation found in references.
zyxel vmg8924-b10d	All versions
CPE cpe:2.3:h:zyxel:vmg8924-b10d:-:::::::* Remediation No remediation found in references.
zyxel xmg3927-b50a firmware	< 5.15\(abmt.5\)c0
CPE cpe:2.3:o:zyxel:xmg3927-b50a_firmware:::::::: Remediation No remediation found in references.
zyxel xmg3927-b50a	All versions
CPE cpe:2.3:h:zyxel:xmg3927-b50a:-:::::::* Remediation No remediation found in references.
zyxel xmg8825-b50a firmware	< 5.17\(abmt.5\)c0
CPE cpe:2.3:o:zyxel:xmg8825-b50a_firmware:::::::: Remediation No remediation found in references.
zyxel xmg8825-b50a	All versions
CPE cpe:2.3:h:zyxel:xmg8825-b50a:-:::::::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Jan 14, 2026	Initial Analysis	[email protected]
Jul 16, 2025	New CVE Received	[email protected]

CVE-2025-7673 Details

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