What is CVE-2022-34746?

CVE-2022-34746 is a medium-severity vulnerability in Zyxel Gs1900-10hp, classified under Insufficient Entropy. CVSS score: 5.9/10. Published 2022-09-20.

How severe is CVE-2022-34746?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Zyxel Gs1900-10hp

CVE-2022-34746

An insufficient entropy vulnerability caused by the improper use of randomness sources with low entropy for RSA key pair generation was found in Zyxel GS1900 series firmware versions prior to V2.70. This vulnerability could allow an unauthenticated attacker to retrieve a private key by factoring the RSA modulus N in the certificate of the web administration interface.

Published 2022-09-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (31.3th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-331 — Insufficient Entropy

References

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

Frequently asked questions

What is CVE-2022-34746?: CVE-2022-34746 is a medium-severity vulnerability in Zyxel Gs1900-10hp, classified under Insufficient Entropy. CVSS score: 5.9/10. Published 2022-09-20.
How severe is CVE-2022-34746?: Medium severity. CVSS v3 base score is 5.9 out of 10.