Vulnerability Monitor

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CVE-2006-2559

Linksys WRT54G Wireless-G Broadband Router allows remote attackers to bypass access restrictions and conduct unauthorized operations via a UPnP request with a modified InternalClient parameter, which is not validated, as demonstrated by using AddPortMapping to forward arbitrary traffic.

Security Impact Summary

CVE-2006-2559 is a security vulnerability that . Impacting 2 products from linksys, from linksys organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2006, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2006-05-24T01:02:00.000

Last Modified

2026-04-16T00:27:16.627

Status

Modified

Source

[email protected]

Severity

CVSSv2: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
NVD-CWE-Other

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Hardware	linksys	wrt54g	1.42.3	Yes
Hardware	linksys	wrt54g	2.00.8	Yes
Hardware	linksys	wrt54g	2.02.7	Yes
Hardware	linksys	wrt54g	2.04.4	Yes
Hardware	linksys	wrt54g	2.04.4_non_default	Yes
Hardware	linksys	wrt54g	3.01.3	Yes
Hardware	linksys	wrt54g	3.03.6	Yes
Hardware	linksys	wrt54g	4.00.7	Yes
Hardware	linksys	wrt54g_v5	*	Yes

References

http://secunia.com/advisories/20161 Patch, Vendor Advisory ([email protected])
http://securitytracker.com/id?1016134 ([email protected])
http://www.securityview.org/dutch-student-finds-a-bug-in-upnp.html URL Repurposed ([email protected])
http://www.securityview.org/how-does-the-upnp-flaw-works.html URL Repurposed ([email protected])
http://www.vupen.com/english/advisories/2006/1909 ([email protected])
https://exchange.xforce.ibmcloud.com/vulnerabilities/26707 ([email protected])
http://secunia.com/advisories/20161 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://securitytracker.com/id?1016134 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityview.org/dutch-student-finds-a-bug-in-upnp.html URL Repurposed (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityview.org/how-does-the-upnp-flaw-works.html URL Repurposed (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2006/1909 (af854a3a-2127-422b-91ae-364da2661108)
https://exchange.xforce.ibmcloud.com/vulnerabilities/26707 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For linksys's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.