CVE-2011-4499
7.5 · HIGHThe UPnP IGD implementation in the Broadcom UPnP stack on the Cisco Linksys WRT54G with firmware before 4.30.5, WRT54GS v1 through v3 with firmware before 4.71.1, and WRT54GS v4 with firmware befor…
Overview
CVE-2011-4499 is a high-severity vulnerability affecting cisco linksys_wrt54g_router_firmware. It was published on November 22, 2011 and has a CVSS 2.0 base score of 7.5 (HIGH).
This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical description
The UPnP IGD implementation in the Broadcom UPnP stack on the Cisco Linksys WRT54G with firmware before 4.30.5, WRT54GS v1 through v3 with firmware before 4.71.1, and WRT54GS v4 with firmware before 1.06.1 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.
Remediation
Check the references section for vendor advisories and patches from cisco. Update linksys_wrt54g_router_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| cisco | linksys_wrt54g_router_firmware | 0 | Affected |
| cisco | linksys_wrt54gs_router_firmware | 0 | Affected |
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Frequently asked questions
What is CVE-2011-4499?
CVE-2011-4499 is a high-severity vulnerability affecting cisco linksys_wrt54g_router_firmware. It was published on November 22, 2011 and has a CVSS 2.0 base score of 7.5 (HIGH).
How severe is CVE-2011-4499?
This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2011-4499?
Check the references section for vendor advisories and patches from cisco. Update linksys_wrt54g_router_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2011-4499?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-4499 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.
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