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Vulnerability record · CVE-2022-43389 · published 11 January 2023

CVE-2022-43389: Zyxel lte3202-m437 firmware classic buffer overflow vulnerability

Zyxel · Lte3202 M437 Firmware

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.

9.8 CVSS 3.1 Critical EPSS 0.61% · top 52.2% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
17Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

17 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-and-buffer-ove Vendor Advisory
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-and-buffer-ove Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-22920Zyxel lte3202-m437 firmware improper access control vulnerabilityA security misconfiguration vulnerability exists in the Zyxel LTE3316-M604 firmware version V2.00(ABMP.6)C0 due to a factory default misconfiguration…EPSS 0.84%8.8CVE-2022-43390Zyxel lte7480-m804 firmware os command injection vulnerabilityA command injection vulnerability in the CGI program of Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an authenticated attacker t…EPSS 1.1%8.0CVE-2022-26413Zyxel vmg3312-t20a firmware os command injection vulnerabilityA command injection vulnerability in the CGI program of Zyxel VMG3312-T20A firmware version 5.30(ABFX.5)C0 could allow a local authenticated attacker…EPSS 0.70%7.5CVE-2024-8748Zyxel lte3301-plus firmware classic buffer overflow vulnerabilityA buffer overflow vulnerability in the packet parser of the third-party library "libclinkc" in Zyxel VMG8825-T50K firmware versions through V5.50(ABO…EPSS 0.52%6.5CVE-2023-27989Zyxel lte7480-m804 firmware classic buffer overflow vulnerabilityA buffer overflow vulnerability in the CGI program of the Zyxel NR7101 firmware versions prior to V1.00(ABUV.8)C0 could allow a remote authenticated …EPSS 1.0%6.5CVE-2022-43391Zyxel lte3301-plus firmware classic buffer overflow vulnerabilityA buffer overflow vulnerability in the parameter of the CGI program in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an authentic…EPSS 0.72%6.5CVE-2022-43392Zyxel lte3301-plus firmware classic buffer overflow vulnerabilityA buffer overflow vulnerability in the parameter of web server in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an authenticated …EPSS 0.62%6.5CVE-2021-35036Zyxel ax7501-b0 firmware cleartext storage of sensitive data vulnerabilityA cleartext storage of information vulnerability in the Zyxel VMG3625-T50B firmware version V5.50(ABTL.0)b2k could allow an authenticated attacker to…EPSS 0.49%

Source: NIST National Vulnerability Database (record CVE-2022-43389), CISA KEV, FIRST EPSS (scores of 2026-10-12). This page is refreshed as NVD updates the record.