Is CVE-2011-4600 in the CISA KEV catalog?

No. CVE-2011-4600 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-4600?

CVE-2011-4600 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2011-4600?

CVE-2011-4600 has an EPSS score of 1.78% (76th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2011-4600?

Upgrade libvirt on debian 11 to 0.9.9-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2011-4600

MEDIUMEPSS 76th pctl

5.9

CVSS v3

NVD

Description

The networkReloadIptablesRules function in network/bridge_driver.c in libvirt before 0.9.9 does not properly handle firewall rules on bridge networks when libvirtd is restarted, which might allow remote attackers to bypass intended access restrictions via a (1) DNS or (2) DHCP query.

CWE-284Improper Access Control

How to fix

Remediation Available

libvirtDebian

Fixed in:0.9.9-1CVE-2011-4600

libvirtUbuntu

Fixed in:1.2.2-0ubuntu13.1.16USN-2867-1

libvirt-binUbuntu

Fixed in:1.2.2-0ubuntu13.1.16USN-2867-1

libvirt0Ubuntu

Fixed in:1.2.2-0ubuntu13.1.16USN-2867-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

1.78%probability of exploitation in 30 days

76thpercentile

Elevated risk: more likely to be exploited than 76% of all known CVEs.

References

Vendor Advisory1

libvirt.org

Other references3

Related Vulnerabilities

Other CWE-284 (Improper Access Control) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-27350	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2019-1653	High	7.5	100%	KEV	-
CVE-2023-23752	Medium	5.3	100%	KEV	Fix
CVE-2023-29298	High	7.5	100%	KEV	-
CVE-2023-38205	High	7.5	100%	KEV	-
CVE-2024-27348	Critical	9.8	99%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.