CVE-2008-1255 — The ZyXEL P-660HW series router maintains authentication state by IP address, which allows remote attackers to bypass authentication by establishing a session from a source IP address of a previously authenticated user

Back Back to CVE browser

HIGH

The ZyXEL P-660HW series router maintains authentication state by IP address, which allows remote attackers to bypass authentication by establishing a session from a source IP address of a previously authenticated user

Published Mar 10, 2008

10.0

HIGH

CVSS 2.0

EPSS 3.91%

Description

The ZyXEL P-660HW series router maintains authentication state by IP address, which allows remote attackers to bypass authentication by establishing a session from a source IP address of a previously authenticated user.

Affected products

Remediation

No remediation recorded yet.

Metrics

3.91% 0.03911

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.03911

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	3.91% (0.03911)	89.97th	v5 (v2026.06.15)
Jun 15, 2026	3.91% (0.03911)	88.91th	v5 (v2026.06.15)
Mar 17, 2025	0.34% (0.00343)	54.73th	v4 (v2025.03.14)
Dec 12, 2024	0.85% (0.00849)	82.89th	v3 (v2023.03.01)
Feb 8, 2024	0.50% (0.00501)	75.66th	v3 (v2023.03.01)
Mar 7, 2023	0.50% (0.00501)	72.69th	v3 (v2023.03.01)
Mar 6, 2023	1.14% (0.01136)	59.45th	v2 (v2022.01.01)
Oct 18, 2022	1.14% (0.01136)	58.28th	v2 (v2022.01.01)
Apr 1, 2022	1.14% (0.01136)	56.27th	v2 (v2022.01.01)
Feb 4, 2022	1.14% (0.01136)	34.23th	v2 (v2022.01.01)

Weaknesses (1)

CWE-264

References (3)

http://www.gnucitizen.org/projects/router-hacking-challenge/
x_refsource_MISC
http://www.securityfocus.com/archive/1/489009/100/0/threaded
mailing-listx_refsource_BUGTRAQ
https://exchange.xforce.ibmcloud.com/vulnerabilities/41114
vdb-entryx_refsource_XF

Link	Providers	Tags
http://www.gnucitizen.org/projects/router-hacking-challenge/		x_refsource_MISC
http://www.securityfocus.com/archive/1/489009/100/0/threaded		mailing-listx_refsource_BUGTRAQ
https://exchange.xforce.ibmcloud.com/vulnerabilities/41114		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Mar 10, 2008

Updated Aug 7, 2024

Reserved Mar 10, 2008

Link CVE-2008-1255

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2008-1255

Red Hat

Severity n/a

Public date n/a

Links CVE-2008-1255