Zyxel security advisory for command injection and buffer overflow vulnerabilities of CPE, fiber ONTs, and WiFi extenders

CVE: CVE-2022-43389, CVE-2022-43390, CVE-2022-43391, CVE-2022-43392
Summary

Zyxel is aware of multiple vulnerabilities reported by Positive Technologies and advises users to install the applicable firmware updates for optimal protection.

What are the vulnerabilities?

CVE-2022-43389

A buffer overflow vulnerability in the library of the web server in some 5G NR/4G LTE CPE devices, which could allow a remote unauthenticated attacker to execute some OS commands or to cause denial-of-service (DoS) conditions on a vulnerable device. Note that the WAN access is disabled by default on most devices.

CVE-2022-43390

A command injection vulnerability in the CGI program of some 5G NR/4G LTE CPE, DSL/Ethernet CPE, fiber ONT, and WiFi extender devices, which could allow a remote authenticated attacker to execute some OS commands on a vulnerable device by sending a crafted HTTP request. Note that the WAN access is disabled by default on most devices.

CVE-2022-43391

A buffer overflow vulnerability in the parameter of the CGI program in some 5G NR/4G LTE CPE, DSL/Ethernet CPE, fiber ONT, and WiFi extender devices, which could allow a remote authenticated attacker to cause DoS conditions by sending a crafted HTTP request. Note that the WAN access is disabled by default on most devices.

CVE-2022-43392

A buffer overflow vulnerability in the parameter of web server in some 5G NR/4G LTE CPE, DSL/Ethernet CPE, fiber ONT, and WiFi extender devices, which could allow a remote authenticated attacker to cause DoS conditions by sending a crafted authorization request. Note that the WAN access is disabled by default on most devices.

What versions are vulnerable—and what should you do?

After a thorough investigation, we have identified the vulnerable products that are within their vulnerability support period and released updates to address the vulnerabilities, as shown in the following tables.

Product Affected model Patch availability*
5G NR/4G LTE CPE LTE3202-M437 V1.00(ABWF.1)C0
LTE3316-M604 V2.00(ABMP.6)C0
LTE7480-M804 V1.00(ABRA.6)C0
LTE7490-M904 V1.00(ABQY.5)C0
Nebula FWA510 V1.15(ACGD.3)C0
Nebula FWA710 V1.15(ACGC.3)C0
Nebula NR7101 V1.15(ACCC.3)C0
NR5103 V4.19(ABYC.3)C0
NR5103E Hotfix available now
Standard firmware V1.00(ACDJ.0)C0 in Apr. 2023
NR7101 V1.00(ABUV.7)C0
NR7102 V1.00(ABYD.2)C0
NR7103 V1.00(ACCZ.1)C0
Fiber ONT EP240P Hotfix available now
Standard firmware TBD
PM7320-B0 Hotfix available now
Standard firmware TBD
PMG5317-T20B Hotfix available now
Standard firmware TBD
PMG5617GA Hotfix available now
Standard firmware TBD
PMG5622GA Hotfix available now
Standard firmware TBD
Product Affected model Patch availability*
5G NR/4G LTE CPE LTE7480-M804 V1.00(ABRA.6)C0
LTE7490-M904 V1.00(ABQY.5)C0
Nebula NR5101 V1.15(ACCG.3)C0
Nebula NR7101 V1.15(ACCC.3)C0
NR5101 V1.00(ABVC.6)C0
NR7101 V1.00(ABUV.7)C0
NR7102 V1.00(ABYD.2)C0
DSL/Ethernet CPE DX3301-T0 Hotfix available now
Standard firmware V5.50(ABVY.3.4)C0 in Feb. 2023
DX4510-B1 Hotfix available now
Standard firmware V5.17(ABYL.5)C0 in Jun. 2023
DX5401-B0 Hotfix available now
Standard firmware V5.17(ABYO.3.1)C0 in Feb. 2023
EMG3525-T50B Hotfix available now
Standard firmware V5.50(ABPM.7.3)C0 in Feb. 2023
EMG5523-T50B Hotfix available now
Standard firmware V5.50(ABPM.7.3)C0 in Feb. 2023
EMG5723-T50K Hotfix available now
Standard firmware V5.50(ABOM.8.2)C0 in Feb. 2023
EX3301-T0 Hotfix available now
Standard firmware V5.50(ABVY.3.4)C0 in Feb. 2023
EX3510-B0 V5.17(ABUP.7)C0
EX5401-B0 Hotfix available now
Standard firmware V5.17(ABYO.3.1)C0 in Feb. 2023
EX5501-B0 Hotfix available now
Standard firmware V5.17(ABRY.3.2)C0 in Feb. 2023
EX5510-B0 V5.17(ABQX.7)C0
EX5512-T0 Hotfix available now
Standard firmware TBD
EX5600-T1 Hotfix available now
Standard firmware V5.70(ACDZ.0.1)C0 in Feb. 2023
EX5601-T0 Hotfix available now
Standard firmware V5.70(ACDZ.0.1)C0 in Feb. 2023
EX5601-T1 Hotfix available now
Standard firmware V5.70(ACDZ.0.1)C0 in Feb. 2023
VMG3927-T50K Hotfix available now
Standard firmware V5.50(ABOM.8.2)C0 in Feb. 2023
VMG4005-B50A Hotfix available now
Standard firmware V5.17(ABQA.2)C0 in Feb. 2023
VMG4005-B60A Hotfix available now
Standard firmware V5.17(ABQA.2)C0 in Feb. 2023
VMG8623-T50B Hotfix available now
Standard firmware V5.50(ABPM.7.3)C0 in Feb. 2023
VMG8825-T50K Hotfix available now
Standard firmware V5.50(ABOM.8.2)C0 in Feb. 2023
Fiber ONT AX7501-B0 Hotfix available now
Standard firmware V5.17(ABPC.3)C0 in Feb. 2023
PM3100-T0 Hotfix available now
Standard firmware V5.42(ACBF.1.1)C0 in Feb. 2023
PM5100-T0 Hotfix available now
Standard firmware V5.42(ACBF.1.1)C0 in Feb. 2023
PM7300-T0 Hotfix available now
Standard firmware V5.42(ABYY.1)C0 in Feb. 2023
PM7320-B0 Hotfix available now
Standard firmware TBD
PMG5317-T20B Hotfix available now
Standard firmware TBD
PMG5617-T20B2 Hotfix available now
Standard firmware TBD
PMG5617GA Hotfix available now
Standard firmware TBD
PMG5622GA Hotfix available now
Standard firmware TBD
WiFi extender WX3100-T0 Hotfix available now
Standard firmware V5.50(ABVL.1.1)C0 in Feb. 2023
WX3401-B0 Hotfix available now
Standard firmware V5.17(ABVE.2.1)C0 in Feb. 2023
WX5600-T0 Hotfix available now
Standard firmware V5.70(ACEB.0.1)C0 in Feb. 2023
Product Affected model Patch availability*
5G NR/4G LTE CPE LTE3301-PLUS Hotfix available now
Standard firmware V1.00(ABQU.5)C0 in Feb. 2023
LTE5388-M804 Hotfix available now
Standard firmware V1.00(ABSQ.4)C0 in Apr. 2023
LTE5398-M904 Hotfix available now
Standard firmware V1.00(ABQV.3)C0 in Apr. 2023
LTE7240-M403 Hotfix available now
Standard firmware V2.00(ABMG.6)C0 in May 2023
LTE7461-M602 Hotfix available now
Standard firmware V2.00(ABQN.6)C0 in May 2023
LTE7480-M804 V1.00(ABRA.6)C0
LTE7480-S905 Hotfix available now
Standard firmware V1.00(ABVN.6)C0 in May 2023
LTE7485-S905 Hotfix available now
Standard firmware V2.00(ABQT.6)C0 in May 2023
LTE7490-M904 V1.00(ABQY.5)C0
Nebula LTE3301-PLUS V1.15(ACCA.3)C0
Nebula LTE7461-M602 V1.15(ACEV.3)C0
Nebula NR5101 V1.15(ACCG.3)C0
Nebula NR7101 V1.15(ACCC.3)C0
NR5101 V1.00(ABVC.6)C0
NR7101 V1.00(ABUV.7)C0
NR7102 V1.00(ABYD.2)C0
DSL/Ethernet CPE DX3301-T0 Hotfix available now
Standard firmware V5.50(ABVY.3.4)C0 in Feb. 2023
DX4510-B1 Hotfix available now
Standard firmware V5.17(ABYL.5)C0 in Jun. 2023
DX5401-B0 Hotfix available now
Standard firmware V5.17(ABYO.3.1)C0 in Feb. 2023
EMG3525-T50B Hotfix available now
Standard firmware V5.50(ABPM.7.3)C0 in Feb. 2023
EMG5523-T50B Hotfix available now
Standard firmware V5.50(ABPM.7.3)C0 in Feb. 2023
EMG5723-T50K Hotfix available now
Standard firmware V5.50(ABOM.8.2)C0 in Feb. 2023
EX3301-T0 Hotfix available now
Standard firmware V5.50(ABVY.3.4)C0 in Feb. 2023
EX3510-B0 V5.17(ABUP.7)C0
EX5401-B0 Hotfix available now
Standard firmware V5.17(ABYO.3.1)C0 in Feb. 2023
EX5501-B0 Hotfix available now
Standard firmware V5.17(ABRY.3.2)C0 in Feb. 2023
EX5510-B0 V5.17(ABQX.7)C0
EX5512-T0 Hotfix available now
Standard firmware TBD
EX5600-T1 Hotfix available now
Standard firmware V5.70(ACDZ.0.1)C0 in Feb. 2023
EX5601-T0 Hotfix available now
Standard firmware V5.70(ACDZ.0.1)C0 in Feb. 2023
EX5601-T1 Hotfix available now
Standard firmware V5.70(ACDZ.0.1)C0 in Feb. 2023
VMG3927-T50K Hotfix available now
Standard firmware V5.50(ABOM.8.2)C0 in Feb. 2023
VMG4005-B50A Hotfix available now
Standard firmware V5.17(ABQA.2)C0 in Feb. 2023
VMG4005-B60A Hotfix available now
Standard firmware V5.17(ABQA.2)C0 in Feb. 2023
VMG8623-T50B Hotfix available now
Standard firmware V5.50(ABPM.7.3)C0 in Feb. 2023
VMG8825-T50K Hotfix available now
Standard firmware V5.50(ABOM.8.2)C0 in Feb. 2023
Fiber ONT AX7501-B0 Hotfix available now
Standard firmware V5.17(ABPC.3)C0 in Feb. 2023
PM3100-T0 Hotfix available now
Standard firmware V5.42(ACBF.1.1)C0 in Feb. 2023
PM5100-T0 Hotfix available now
Standard firmware V5.42(ACBF.1.1)C0 in Feb. 2023
PM7300-T0 Hotfix available now
Standard firmware V5.42(ABYY.1)C0 in Feb. 2023
PM7320-B0 Hotfix available now
Standard firmware TBD
PMG5317-T20B Hotfix available now
Standard firmware TBD
PMG5617-T20B2 Hotfix available now
Standard firmware TBD
PMG5617GA Hotfix available now
Standard firmware TBD
PMG5622GA Hotfix available now
Standard firmware TBD
WiFi extender WX3100-T0 Hotfix available now
Standard firmware V5.50(ABVL.1.1)C0 in Feb. 2023
WX3401-B0 Hotfix available now
Standard firmware V5.17(ABVE.2.1)C0 in Feb. 2023
WX5600-T0 Hotfix available now
Standard firmware V5.70(ACEB.0.1)C0 in Feb. 2023
Product Affected model Patch availability*
5G NR/4G LTE CPE LTE3301-PLUS Hotfix available now
Standard firmware V1.00(ABQU.5)C0 in Feb. 2023
LTE5388-M804 Hotfix available now
Standard firmware V1.00(ABSQ.4)C0 in Apr. 2023
LTE5398-M904 Hotfix available now
Standard firmware V1.00(ABQV.3)C0 in Apr. 2023
LTE7240-M403 Hotfix available now
Standard firmware V2.00(ABMG.6)C0 in May 2023
LTE7461-M602 Hotfix available now
Standard firmware V2.00(ABQN.6)C0 in May 2023
LTE7480-M804 V1.00(ABRA.6)C0
LTE7480-S905 Hotfix available now
Standard firmware V1.00(ABVN.6)C0 in May 2023
LTE7485-S905 Hotfix available now
Standard firmware V2.00(ABQT.6)C0 in May 2023
LTE7490-M904 V1.00(ABQY.5)C0
Nebula LTE3301-PLUS V1.15(ACCA.3)C0
Nebula LTE7461-M602 V1.15(ACEV.3)C0
Nebula NR5101 V1.15(ACCG.3)C0
Nebula NR7101 V1.15(ACCC.3)C0
NR5101 V1.00(ABVC.6)C0
NR7101 V1.00(ABUV.7)C0
NR7102 V1.00(ABYD.2)C0
DSL/Ethernet CPE DX3301-T0 Hotfix available now
Standard firmware V5.50(ABVY.3.4)C0 in Feb. 2023
DX4510-B1 Hotfix available now
Standard firmware V5.17(ABYL.5)C0 in Jun. 2023
DX5401-B0 Hotfix available now
Standard firmware V5.17(ABYO.3.1)C0 in Feb. 2023
EMG3525-T50B Hotfix available now
Standard firmware V5.50(ABPM.7.3)C0 in Feb. 2023
EMG5523-T50B Hotfix available now
Standard firmware V5.50(ABPM.7.3)C0 in Feb. 2023
EMG5723-T50K Hotfix available now
Standard firmware V5.50(ABOM.8.2)C0 in Feb. 2023
EX3301-T0 Hotfix available now
Standard firmware V5.50(ABVY.3.4)C0 in Feb. 2023
EX3510-B0 V5.17(ABUP.7)C0
EX5401-B0 Hotfix available now
Standard firmware V5.17(ABYO.3.1)C0 in Feb. 2023
EX5501-B0 Hotfix available now
Standard firmware V5.17(ABRY.3.2)C0 in Feb. 2023
EX5510-B0 V5.17(ABQX.7)C0
EX5512-T0 Hotfix available now
Standard firmware TBD
EX5600-T1 Hotfix available now
Standard firmware V5.70(ACDZ.0.1)C0 in Feb. 2023
EX5601-T0 Hotfix available now
Standard firmware V5.70(ACDZ.0.1)C0 in Feb. 2023
EX5601-T1 Hotfix available now
Standard firmware V5.70(ACDZ.0.1)C0 in Feb. 2023
VMG3927-T50K Hotfix available now
Standard firmware V5.50(ABOM.8.2)C0 in Feb. 2023
VMG4005-B50A Hotfix available now
Standard firmware V5.17(ABQA.2)C0 in Feb. 2023
VMG4005-B60A Hotfix available now
Standard firmware V5.17(ABQA.2)C0 in Feb. 2023
VMG8623-T50B Hotfix available now
Standard firmware V5.50(ABPM.7.3)C0 in Feb. 2023
VMG8825-T50K Hotfix available now
Standard firmware V5.50(ABOM.8.2)C0 in Feb. 2023
Fiber ONT AX7501-B0 Hotfix available now
Standard firmware V5.17(ABPC.3)C0 in Feb. 2023
PM3100-T0 Hotfix available now
Standard firmware V5.42(ACBF.1.1)C0 in Feb. 2023
PM5100-T0 Hotfix available now
Standard firmware V5.42(ACBF.1.1)C0 in Feb. 2023
PM7300-T0 Hotfix available now
Standard firmware V5.42(ABYY.1)C0 in Feb. 2023
PM7320-B0 Hotfix available now
Standard firmware TBD
PMG5317-T20B Hotfix available now
Standard firmware TBD
PMG5617-T20B2 Hotfix available now
Standard firmware TBD
PMG5617GA Hotfix available now
Standard firmware TBD
PMG5622GA Hotfix available now
Standard firmware TBD
WiFi extender WX3100-T0 Hotfix available now
Standard firmware V5.50(ABVL.1.1)C0 in Feb. 2023
WX3401-B0 Hotfix available now
Standard firmware V5.17(ABVE.2.1)C0 in Feb. 2023
WX5600-T0 Hotfix available now
Standard firmware V5.70(ACEB.0.1)C0 in Feb. 2023

*For the patch firmware without a download link, please reach out to your local Zyxel support team for the file.

Please note that the table does NOT include customized models for internet service providers (ISPs).

For ISPs, please contact your Zyxel sales or service representatives for further details.

For end-users who received your Zyxel device from an ISP, we recommend you reach out to the ISP’s support team directly, as the device may have custom-built settings.

For end-users who purchased the Zyxel devices on your own, please contact your local Zyxel support team for the new firmware file to ensure optimal protection, or visit our forum for further assistance.

Got a question?

Please contact your local service rep or visit Zyxel’s Community for further information or assistance.

Acknowledgment

Thanks to Nikita Abramov from Positive Technologies for reporting the issues to us.

Revision history

2023-1-11: Initial release