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.
CVE-2011-4499 is a security vulnerability that . Impacting 4 products from cisco, from linksys, from cisco and 1 other, organizations running these solutions should prioritize assessment and patching.
Documented in 2011, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.
2011-11-22T11:55:04.683
2026-04-29T01:13:23.040
Modified
CVSSv2: 7.5 (HIGH)
AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | cisco | linksys_wrt54g_router_firmware | ≤ 4.20.8 | Yes |
| Application | cisco | linksys_wrt54g_router_firmware | 3.03.9 | Yes |
| Application | cisco | linksys_wrt54g_router_firmware | 4.20.7 | Yes |
| Hardware | linksys | wrt54g | * | Yes |
| Hardware | linksys | wrt54g | 2.2 | Yes |
| Application | cisco | linksys_wrt54gs_router_firmware | ≤ 4.70.6 | Yes |
| Application | cisco | linksys_wrt54gs_router_firmware | 2.09.1 | Yes |
| Hardware | linksys | wrt54gs | 1.0 | Yes |
| Hardware | linksys | wrt54gs | 2.0 | Yes |
| Hardware | linksys | wrt54gs | 3.0 | Yes |
| Application | cisco | linksys_wrt54gs_router_firmware | ≤ 1.06 | Yes |
| Hardware | linksys | wrt54gs | 4.0 | Yes |
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 cisco'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.