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Vulnerability record · CVE-2022-26414 · published 11 April 2022

CVE-2022-26414: Zyxel vmg3312-t20a firmware classic buffer overflow vulnerability

Zyxel · Vmg3312 T20a Firmware

A potential buffer overflow vulnerability was identified in some internal functions of Zyxel VMG3312-T20A firmware version 5.30(ABFX.5)C0, which could be exploited by a local authenticated attacker to cause a denial of service.

5.5 CVSS 3.1 Medium EPSS 0.21% · top 89.9% CWE-120 · Classic buffer overflow
5.5CVSS 3.1 base score, v2 4.9
0.21%EPSS exploitation probability, 30 days
NoNot in CISA KEV
32Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A potential buffer overflow vulnerability was identified in some internal functions of Zyxel VMG3312-T20A firmware version 5.30(ABFX.5)C0, which could be exploited by a local authenticated attacker to cause a denial of service.

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

Affected products

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

References

LinkTags
https://www.zyxel.com/support/OS-command-injection-and-buffer-overflow-vulnerabilities-of-CPE-and-ONTs.shtml Vendor Advisory
https://www.zyxel.com/support/OS-command-injection-and-buffer-overflow-vulnerabilities-of-CPE-and-ONTs.shtml Vendor Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2022-26414), CISA KEV, FIRST EPSS (scores of 2026-10-11). This page is refreshed as NVD updates the record.