What is CVE-2023-22919?

CVE-2023-22919 is a high-severity vulnerability in Zyxel Nbg6604, classified under OS Command Injection. CVSS score: 8.8/10. Published 2023-05-01.

How severe is CVE-2023-22919?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Zyxel Nbg6604

CVE-2023-22919

The post-authentication command injection vulnerability in the Zyxel NBG6604 firmware version V1.01(ABIR.0)C0 could allow an authenticated attacker to execute some OS commands remotely by sending a crafted HTTP request.

Vulnerability class: Command Injection (OS Command Injection)

Published 2023-05-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: -0.001

Affected products

Zyxel Nbg6604
Zyxel Nbg6604 Firmware — versions V1.01(ABIR.0)C0
Zyxel Nbg6604 Firmware — versions 1.01\(abir.0\)c0, 1.01(abir.0)c0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for… (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-22919?: CVE-2023-22919 is a high-severity vulnerability in Zyxel Nbg6604, classified under OS Command Injection. CVSS score: 8.8/10. Published 2023-05-01.
How severe is CVE-2023-22919?: High severity. CVSS v3 base score is 8.8 out of 10.