What is CVE-2008-1521?

CVE-2008-1521 is a vulnerability in Zyxel Prestige 660, classified under CWE-264. Published 2008-03-26.

Is CVE-2008-1521 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-2008-1521

ZyXEL Prestige routers, including P-660 and P-661 models with firmware 3.40(AGD.2) through 3.40(AHQ.3), allow remote authenticated users to gain privileges by accessing administrative URIs, as demonstrated by rpSysAdmin.html.

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

CVSS v2 metric

CVSS v2 base score 6.5 (Medium). Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.011 (64.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · 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-264

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

Frequently asked questions

What is CVE-2008-1521?: CVE-2008-1521 is a vulnerability in Zyxel Prestige 660, classified under CWE-264. Published 2008-03-26.
Is CVE-2008-1521 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.