Unrated severityNVD Advisory· Published Nov 22, 2011· Updated Jun 16, 2026

CVE-2011-4503

Description

The UPnP IGD implementation in Broadcom Linux on the Sitecom WL-111 allows remote attackers to establish arbitrary port mappings by sending a UPnP AddPortMapping action in a SOAP request to the WAN interface, related to an "external forwarding" vulnerability.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Sitecom/Wl 111llm-fuzzy2 versions
(expand)+ 1 more
- (no CPE)
- cpe:2.3:h:sitecom:wl-111:-:*:*:*:*:*:*:*
Broadcom Corporation/Broadcom Linuxllm-fuzzy2 versions
(expand)+ 1 more
- (no CPE)
- cpe:2.3:o:broadcom:broadcom_linux:*:*:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

www.kb.cert.org/vuls/id/357851nvdUS Government Resource
www.upnp-hacks.org/suspect.htmlnvd

News mentions

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