How severe is CVE-2011-4501?

CVE-2011-4501 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2011-4501 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4501?

CVE-2011-4501 primarily affects Edimax Br-6104k Router Firmware. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4501?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-4501 published?

CVE-2011-4501 was published on 2011-11-22 and last updated on 2026-06-16.

CVE-2011-4501

CVE-2011-4501 is a critical-severity vulnerability in Edimax Br-6104k Router Firmware with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-16.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-16
Affected product: Edimax Br-6104k Router Firmware
Published: 2011-11-22
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2011-4501?: CVE-2011-4501 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2011-4501 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4501?: CVE-2011-4501 primarily affects Edimax Br-6104k Router Firmware. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4501?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-4501 published?: CVE-2011-4501 was published on 2011-11-22 and last updated on 2026-06-16.

References

Affected products (14)

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

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