What is CVE-2023-22922?

CVE-2023-22922 is a high-severity vulnerability in Zyxel Nbg-418n, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2023-05-01.

How severe is CVE-2023-22922?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Zyxel Nbg-418n

CVE-2023-22922

A buffer overflow vulnerability in the Zyxel NBG-418N v2 firmware versions prior to V1.00(AARP.14)C0 could allow a remote unauthenticated attacker to cause DoS conditions by sending crafted packets if Telnet is enabled on a vulnerable device.

Vulnerability class: Buffer Overflow

EPSS: 0.009 (57.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Zyxel Nbg-418n — versions v2
Zyxel Nbg-418n_firmware
Zyxel Nbg-418n V2 Firmware — versions < V1.00(AARP.14)C0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

security@zyxel.com.tw (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-22922?: CVE-2023-22922 is a high-severity vulnerability in Zyxel Nbg-418n, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2023-05-01.
How severe is CVE-2023-22922?: High severity. CVSS v3 base score is 7.5 out of 10.