What is CVE-2008-1522?

CVE-2008-1522 is a vulnerability in Zyxel Prestige 660, classified under CWE-16. Published 2008-03-26.

Is CVE-2008-1522 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Zyxel Prestige 660

CVE-2008-1522

ZyXEL Prestige routers, including P-660 and P-661 models with firmware 3.40(AGD.2) through 3.40(AHQ.3), have (1) "user" as their default password for the "user" account and (2) "1234" as their default password for the "admin" account, which makes it easier for remote attackers to obtain access.

Published 2008-03-26 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 7.5 (High). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.014 (70.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Zyxel Prestige 660 — versions h-d1, h-d3
Zyxel Prestige 661 — versions hw-d1
Zyxel Zynos — versions 3.40

Weakness classification (CWE)

CWE-16

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

Frequently asked questions

What is CVE-2008-1522?: CVE-2008-1522 is a vulnerability in Zyxel Prestige 660, classified under CWE-16. Published 2008-03-26.
Is CVE-2008-1522 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.