What is CVE-2008-1256?

CVE-2008-1256 is a vulnerability in Zyxel P-660hw. Published 2008-03-10.

Is CVE-2008-1256 known to be exploited?

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

Vulnerability in Zyxel P-660hw

CVE-2008-1256

The ZyXEL P-660HW series router has "admin" as its default password, which allows remote attackers to gain administrative access.

Published 2008-03-10 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 10.0 (High). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.033 (88.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000

Affected products

Zyxel P-660hw

Public proof-of-concept exploits

References

www.securityfocus.com/archive/1/489009/100/0/threaded (mailing-list)
www.gnucitizen.org/projects/router-hacking-challenge/
exchange.xforce.ibmcloud.com/vulnerabilities/41108 (vdb-entry)

Frequently asked questions

What is CVE-2008-1256?: CVE-2008-1256 is a vulnerability in Zyxel P-660hw. Published 2008-03-10.
Is CVE-2008-1256 known to be exploited?: 13 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.