How severe is CVE-2011-0220?

CVE-2011-0220 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2011-0220 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0220?

CVE-2011-0220 affects Apple Bonjour. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-0220?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-0220 published?

CVE-2011-0220 was published on 2020-02-05 and last updated on 2026-06-16.

CVE-2011-0220

CVE-2011-0220 is a medium-severity vulnerability in Apple Bonjour with a CVSS 3.x base score of 5.5. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.9
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apple Bonjour
Published: 2020-02-05
Last modified: 2026-06-16

Description

Apple Bonjour before 2011 allows a crash via a crafted multicast DNS packet.

Frequently asked questions

What is CVE-2011-0220?: Apple Bonjour before 2011 allows a crash via a crafted multicast DNS packet.
How severe is CVE-2011-0220?: CVE-2011-0220 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2011-0220 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0220?: CVE-2011-0220 affects Apple Bonjour. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-0220?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-0220 published?: CVE-2011-0220 was published on 2020-02-05 and last updated on 2026-06-16.

References

https://opensource.apple.com/source/mDNSResponder/mDNSResponder-541/mDNSPosix/ReadMe.txt

Affected products (1)

cpe:2.3:a:apple:bonjour:*:*:*:*:*:*:*:*

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