CVE-2011-4500 — The UPnP IGD implementation on the Cisco Linksys WRT54GX with firmware 2.00.05, when UPnP is enabled, configures the SOAP server to listen on the WAN port, which allows remote attackers to administer the firewall via SOAP requests

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HIGH

The UPnP IGD implementation on the Cisco Linksys WRT54GX with firmware 2.00.05, when UPnP is enabled, configures the SOAP server to listen on the WAN port, which allows remote attackers to administer the firewall via SOAP requests

Published Nov 22, 2011

7.5

HIGH

CVSS 2.0

EPSS 1.31%

Description

The UPnP IGD implementation on the Cisco Linksys WRT54GX with firmware 2.00.05, when UPnP is enabled, configures the SOAP server to listen on the WAN port, which allows remote attackers to administer the firewall via SOAP requests.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.31% 0.01309

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01309

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (13 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.31% (0.01309)	69.57th	v5 (v2026.06.15)
Jun 15, 2026	1.43% (0.01426)	69.38th	v5 (v2026.06.15)
Mar 17, 2025	0.33% (0.00325)	53.23th	v4 (v2025.03.14)
Dec 12, 2024	0.41% (0.00414)	74.81th	v3 (v2023.03.01)
May 10, 2024	0.33% (0.00331)	70.93th	v3 (v2023.03.01)
Apr 25, 2024	0.31% (0.00311)	69.72th	v3 (v2023.03.01)
Mar 15, 2024	0.26% (0.00263)	65.28th	v3 (v2023.03.01)
Feb 8, 2024	0.25% (0.00250)	64.04th	v3 (v2023.03.01)
Mar 7, 2023	0.41% (0.00414)	69.95th	v3 (v2023.03.01)
Mar 6, 2023	1.05% (0.01055)	52.13th	v2 (v2022.01.01)
Sep 17, 2022	1.05% (0.01055)	50.47th	v2 (v2022.01.01)
Apr 1, 2022	1.05% (0.01055)	48.43th	v2 (v2022.01.01)
Feb 4, 2022	1.05% (0.01055)	27.52th	v2 (v2022.01.01)

Weaknesses (1)

CWE-16

References (2)

http://www.kb.cert.org/vuls/id/357851
third-party-advisoryx_refsource_CERT-VNUS Government Resource
http://www.upnp-hacks.org/devices.html
x_refsource_MISC

Link	Providers	Tags
http://www.kb.cert.org/vuls/id/357851		third-party-advisoryx_refsource_CERT-VNUS Government Resource
http://www.upnp-hacks.org/devices.html		x_refsource_MISC

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Nov 22, 2011

Updated Sep 16, 2024

Reserved Nov 22, 2011

Link CVE-2011-4500

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2011-4500

Red Hat

Severity n/a

Public date n/a

Links CVE-2011-4500