CVE Catalog

CVE-2006-2562

High
Published: Translated: NVD NIST

Summary

ZyXEL P-335WT router does not validate the InternalClient parameter in UPnP requests, allowing remote attackers to bypass access restrictions and perform unauthorized operations, such as adding port mappings (AddPortMapping) for arbitrary traffic.

Risk Assessment

An attacker can redirect network traffic to any host, enabling data interception, man-in-the-middle attacks, or using the router as a proxy to attack other systems.

Recommendation

It is recommended to disable UPnP on the ZyXEL P-335WT router or apply a firmware update from the vendor if available.

Related vulnerabilities

Original NVD description (English source)

ZyXEL P-335WT 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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS