critical
9.8
CWE
120 119
Advisory Published
Updated

CVE-2022-43389: Buffer Overflow

First published: Wed Jan 11 2023(Updated: )

A buffer overflow vulnerability in the library of the web server in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an unauthenticated attacker to execute some OS commands or to cause denial-of-service (DoS) conditions on a vulnerable device.

Credit: security@zyxel.com.tw

Affected SoftwareAffected VersionHow to fix
Zyxel Lte3202-m437 Firmware<1.00\(abwf.1\)c0
Zyxel Lte3202-m437
Zyxel LTE3316-M604 firmware<2.00\(abmp.6\)c0
Zyxel LTE3316-M604
Zyxel Lte7480-m804 Firmware<1.00\(abra.6\)c0
Zyxel Lte7480-m804
Zyxel Lte7490-m904 Firmware<1.00\(abqy.5\)c0
Zyxel Lte7490-m904
Zyxel Nebula Fwa510 Firmware<1.15\(acgd.3\)c0
Zyxel Nebula Fwa510
Zyxel Nebula Fwa710 Firmware<1.15\(acgc.3\)c0
Zyxel Nebula Fwa710
Zyxel Nebula Nr7101 Firmware<1.15\(accc.3\)c0
Zyxel Nebula Nr7101
Zyxel Nr5103 Firmware<4.19\(abyc.3\)c0
Zyxel Nr5103
Zyxel Nr5103e Firmware
Zyxel Nr5103e
Zyxel NR7101 firmware<1.00\(abuv.7\)c0
Zyxel NR7101
Zyxel Nr7102 Firmware<1.00\(abyd.2\)c0
Zyxel Nr7102
Zyxel Nr7103 Firmware<1.00\(accz.1\)c0
Zyxel Nr7103
Zyxel Ep240p Firmware
Zyxel Ep240p
Zyxel Pm7320-b0 Firmware
Zyxel Pm7320-b0
Zyxel Pmg5317-t20b Firmware
Zyxel Pmg5317-t20b
Zyxel Pmg5617ga Firmware
Zyxel Pmg5617ga
Zyxel Pmg5622ga Firmware
Zyxel Pmg5622ga

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Reference Links

Frequently Asked Questions

  • What is CVE-2022-43389?

    CVE-2022-43389 is a buffer overflow vulnerability in the library of the web server in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an unauthenticated attacker to execute some OS commands or to cause denial-of-service (DoS) conditions on a vulnerable device.

  • How severe is CVE-2022-43389?

    CVE-2022-43389 has a severity rating of 9.8 out of 10 (critical).

  • What software is affected by CVE-2022-43389?

    Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0 is affected by CVE-2022-43389.

  • How can an attacker exploit CVE-2022-43389?

    An unauthenticated attacker can exploit CVE-2022-43389 by executing OS commands or causing denial-of-service conditions on a vulnerable Zyxel NR7101 device.

  • Is there a fix for CVE-2022-43389?

    Yes, Zyxel has released a firmware update to address the CVE-2022-43389 vulnerability. It is recommended to update to version V1.15(ACCC.3)C0 or later.

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