CVE-2011-4501

The UPnP IGD implementation in Edimax EdiLinux on the Edimax BR-6104K with firmware before 3.25, Edimax 6114Wg, Canyon-Tech CN-WF512 with firmware 1.83, Canyon-Tech CN-WF514 with firmware 2.08, Sitecom WL-153 with firmware before 1.39, and Sweex LB000021 with firmware 3.15 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.

Published: 2011-11-22 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-4501 is rated High Risk (72.7/100): CVSS Critical severity, with high exploitation likelihood (EPSS 5.64%, 90th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +1.11% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-4501

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-19 4.53% 5.64% +1.11%
2 2025-10-13 2.53% 4.53% +2.00%
3 2025-09-15 — 2.53% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4501

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2011-4501

Affected software / configurations for CVE-2011-4501

Vendor Product Version Raw CPE
edimax br-6104k_router_firmware 3.21 cpe:2.3:o:edimax:br-6104k_router_firmware:3.21:*:*:*:*:*:*:*
edimax br-6104k — cpe:2.3:h:edimax:br-6104k:-:*:*:*:*:*:*:*
canyon-tech cn-wf512_router_firmware 1.83 cpe:2.3:o:canyon-tech:cn-wf512_router_firmware:1.83:*:*:*:*:*:*:*
canyon-tech cn-wf514_router_firmware 2.08 cpe:2.3:o:canyon-tech:cn-wf514_router_firmware:2.08:*:*:*:*:*:*:*
canyon-tech cn-wf512 — cpe:2.3:h:canyon-tech:cn-wf512:-:*:*:*:*:*:*:*
canyon-tech cn-wf514 — cpe:2.3:h:canyon-tech:cn-wf514:-:*:*:*:*:*:*:*
edimax 6114wg_router_firmware 1.83 cpe:2.3:o:edimax:6114wg_router_firmware:1.83:*:*:*:*:*:*:*
edimax 6114wg_router_firmware 2.08 cpe:2.3:o:edimax:6114wg_router_firmware:2.08:*:*:*:*:*:*:*
edimax 6114wg — cpe:2.3:h:edimax:6114wg:-:*:*:*:*:*:*:*
sitecom wl-153_router_firmware 1.31 cpe:2.3:o:sitecom:wl-153_router_firmware:1.31:*:*:*:*:*:*:*
sitecom wl-153_router_firmware 1.34 cpe:2.3:o:sitecom:wl-153_router_firmware:1.34:*:*:*:*:*:*:*
sitecom wl-153 — cpe:2.3:h:sitecom:wl-153:-:*:*:*:*:*:*:*
sweex lb000021_router_firmware 3.15 cpe:2.3:o:sweex:lb000021_router_firmware:3.15:*:*:*:*:*:*:*
sweex lb000021 — cpe:2.3:h:sweex:lb000021:-:*:*:*:*:*:*:*

References for CVE-2011-4501

cvelogic Threat Intelligence