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

CVE-2011-4499

CVE-2011-4499

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.

AI Insight

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

Affected products

14
  • Cisco Systems, Inc./Linksys Wrt54g Router Firmware3 versions
    cpe:2.3:a:cisco:linksys_wrt54g_router_firmware:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:cisco:linksys_wrt54g_router_firmware:*:*:*:*:*:*:*:*range: <=4.20.8
    • cpe:2.3:a:cisco:linksys_wrt54g_router_firmware:3.03.9:*:*:*:*:*:*:*
    • cpe:2.3:a:cisco:linksys_wrt54g_router_firmware:4.20.7:*:*:*:*:*:*:*
  • Cisco Systems, Inc./Linksys Wrt54gs Router Firmware2 versions
    cpe:2.3:a:cisco:linksys_wrt54gs_router_firmware:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:cisco:linksys_wrt54gs_router_firmware:*:*:*:*:*:*:*:*range: <=4.70.6
    • cpe:2.3:a:cisco:linksys_wrt54gs_router_firmware:2.09.1:*:*:*:*:*:*:*
  • Linksys/Wrt54g2 versions
    cpe:2.3:h:linksys:wrt54g:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:h:linksys:wrt54g:*:*:*:*:*:*:*:*
    • cpe:2.3:h:linksys:wrt54g:2.2:*:*:*:*:*:*:*
  • Linksys/Wrt54gs4 versions
    cpe:2.3:h:linksys:wrt54gs:1.0:*:*:*:*:*:*:*+ 3 more
    • cpe:2.3:h:linksys:wrt54gs:1.0:*:*:*:*:*:*:*
    • cpe:2.3:h:linksys:wrt54gs:2.0:*:*:*:*:*:*:*
    • cpe:2.3:h:linksys:wrt54gs:3.0:*:*:*:*:*:*:*
    • cpe:2.3:h:linksys:wrt54gs:4.0:*:*:*:*:*:*:*
  • Cisco Systems, Inc./Linksys WRT54GS v1-v3llm-create
    Range: <4.71.1
  • Cisco Systems, Inc./Linksys WRT54GCllm-fuzzy
    Range: <4.30.5
  • Cisco Systems, Inc./Linksys WRT54GS v4llm-fuzzy
    Range: <1.06.1

Patches

Vulnerability mechanics

References

2

News mentions

0

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