Remote code execution in Zyxel CPE models
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2025-7673 |
| CWE-ID | CWE-119 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
EMG3525-T50B Hardware solutions / Routers for home users EMG5523-T50B Hardware solutions / Routers for home users EMG5723-T50K Hardware solutions / Routers for home users EMG6726-B10A Hardware solutions / Routers for home users EX3510-B0 Hardware solutions / Routers for home users EX5510-B0 Hardware solutions / Routers for home users VMG1312-T20B Hardware solutions / Routers for home users VMG3625-T50B Hardware solutions / Routers for home users VMG3925-B10B/B10C Hardware solutions / Routers for home users VMG3927-B50A_B60A Hardware solutions / Routers for home users VMG3927-B50B Hardware solutions / Routers for home users VMG3927-T50K Hardware solutions / Routers for home users VMG4005-B50B Hardware solutions / Routers for home users VMG4927-B50A Hardware solutions / Routers for home users VMG8623-T50B Hardware solutions / Routers for home users VMG8825-B50A_B60A Hardware solutions / Routers for home users VMG8825-Bx0B Hardware solutions / Routers for home users VMG8825-T50K Hardware solutions / Routers for home users VMG8924-B10D Hardware solutions / Routers for home users XMG3927-B50A Hardware solutions / Routers for home users XMG8825-B50A Hardware solutions / Routers for home users |
| Vendor | ZyXEL Communications Corp. |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Buffer overflow
EUVDB-ID: #VU113043
Risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2025-7673
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the URL parser of the zhttpd web server. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsEMG3525-T50B: before V5.50(ABSL.0)b8
EMG5523-T50B: before V5.50(ABSL.0)b8
EMG5723-T50K: before V5.50(ABOM.5)C0
EMG6726-B10A: before V5.13 (ABNP.6).C0
EX3510-B0: before V5.17(ABUP.3)C0
EX5510-B0: before V5.15(ABQX.3)C0
VMG1312-T20B: before V5.50(ABSB.3)C0
VMG3625-T50B: before V5.50(ABPM.4)C0
VMG3925-B10B/B10C: before V5.13(AAVF.16)C0
VMG3927-B50A_B60A: before V5.15(ABMT.5)C0
VMG3927-B50B: before 5.13(ABLY.6)C0
VMG3927-T50K: before V5.50(ABOM.5)C0
VMG4005-B50B: before V5.13(ABRL.5)C0
VMG4927-B50A: before V5.13(ABLY.6)C0
VMG8623-T50B: before V5.50(ABPM.4)C0
VMG8825-B50A_B60A: before V5.15(ABMT.5)C0
VMG8825-Bx0B: before 5.17(ABNY.5)C0
VMG8825-T50K: before V5.50(ABOM.5)C0
VMG8924-B10D: before V5.13(ABGQ.6)C0
XMG3927-B50A: before V5.15(ABMT.5)C0
XMG8825-B50A: before V5.15(ABMT.5)C0
CPE2.3- cpe:2.3:h:zyxel_communications_corp:emg3525-t50b:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:emg5523-t50b:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:emg5723-t50k:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:emg6726-b10a:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:ex3510-b0:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:ex5510-b0:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg1312-t20b:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg3625-t50b:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg3925-b10b_b10c:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg3927-b50a_b60a:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg3927-b50b:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg3927-t50k:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg4005-b50b:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg4927-b50a:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg8623-t50b:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg8825-b50a_b60a:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg8825-bx0b:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg8825-t50k:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:vmg8924-b10d:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:xmg3927-b50a:*:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:xmg8825-b50a:*:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
