CVE-2011-4503

critical

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.

References

https://euvd.enisa.europa.eu/vulnerability/EUVD-2011-4429

http://www.upnp-hacks.org/suspect.html

http://www.kb.cert.org/vuls/id/357851

Details

Source: Mitre, NVD

Published: 2011-11-22

Updated: 2026-06-16

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Severity: Critical

EPSS

EPSS: 0.02094