CVE-2022-26414

CVE-2022-26414 is a medium-severity vulnerability in Zyxel Vmg3312-t20a Firmware with a CVSS 3.x base score of 6.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

• Severity: Medium (CVSS 3.x base score 6.0)
• CVSS v2: 4.9
• EPSS exploit prediction: 0% (10th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-120
• Affected product: Zyxel Vmg3312-t20a Firmware
• Published: 2022-04-11
• Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2022-26414?

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.

How severe is CVE-2022-26414?

CVE-2022-26414 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2022-26414 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-26414?

CVE-2022-26414 primarily affects Zyxel Vmg3312-t20a Firmware. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-26414?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-26414 published?

CVE-2022-26414 was published on 2022-04-11 and last updated on 2026-06-17.

References

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

Affected products (34)

• cpe:2.3:o:zyxel:vmg3312-t20a_firmware:5.30\(abfx.5\)c0:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:emg3525-t50b_firmware:*:*:*:*:america:*:*:*
• cpe:2.3:o:zyxel:emg3525-t50b_firmware:*:*:*:*:emea:*:*:*
• cpe:2.3:o:zyxel:emg5523-t50b_firmware:*:*:*:*:america:*:*:*
• cpe:2.3:o:zyxel:emg5523-t50b_firmware:*:*:*:*:emea:*:*:*
• cpe:2.3:o:zyxel:emg5723-t50k_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:emg6726-b10a_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg1312-t20b_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg3625-t50b_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg3927-b50a_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg3927-b50b_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg3927-b60a_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg3927-t50k_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg4927-b50a_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg8623-t50b_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg8825-b50a_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg8825-b50b_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg8825-t50k_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg8825-b60a_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:vmg8825-b60b_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:xmg3927-b50a_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:xmg8825-b50a_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:dx5401-b0_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:ex3510-b0_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:ex5401-b0_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:ex5501-b0_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:ax7501-b0_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:ep240p_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:pm7300-t0_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:pmg5317-t20b_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:pmg5617ga_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:pmg5617-t20b2_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:pmg5622ga_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:px7501-b0_firmware:*:*:*:*:*:*:*:*

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