CVE-2008-1256

CRITICAL

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

Affects 1 product across 1 vendor.

BCS7.47
CVSS 2.010.0
EPSS3.3%
Percentile88th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2008. A critical vulnerability affects Zyxel systems (CVE-2008-1256). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2008-GLOBAL-020635-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2008-1256?
This vulnerability was disclosed in 2008. A critical vulnerability affects Zyxel systems (CVE-2008-1256). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2008-1256?
CVE-2008-1256 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 3.3%.
Is CVE-2008-1256 actively exploited?
No confirmed active exploitation of CVE-2008-1256 as of 2026-09-25.
How do I remediate CVE-2008-1256?
Priority: MEDIUM.
What systems are affected by CVE-2008-1256?
CVE-2008-1256 affects: Zyxel.
Vulnerability Details
CVE IDCVE-2008-1256
BSIDBS-2008-GLOBAL-020635-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2008-03-10
Last Modified2026-06-16
ICS Relevance85%
Domains
NETWORK-INFRA
SourceNVD
Official Description

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

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: The ZyXEL P-660HW series router has "admin" as its default password, which allows remote attackers to gain administrative access. CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: LOW

Affected Products
VendorProductFixed Version
Zyxel P-660Hw —
Remediation

No patch URL on record. Monitor vendor security advisories directly.

Threat Intelligence
● Threat Intelligence Validated: September 2026 | Threat Age: 6775 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hash298fd8c3cae17cf10b9ca71517df05fc78ac860017513c574cf1b7b8452363b60e07d61b82ade73cb03c5a63c90fe921ee90dc7b405a4dfe5f7ad919a3c71115
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