CVE-2012-5366

IPv6 disruption via router advertisement flooding

Published Feb 20, 2020 · Updated Aug 6, 2024

Denial of service in Apple Mac OS X releases from 2012 and earlier allows remote attackers to interrupt IPv6 connectivity on the local network. The IPv6 implementation processes a flood of ICMPv6 Router Advertisement packets containing multiple routing entries until neighbor discovery stops responding. Remote attackers must share the target's local network, and the demonstrated consequence is loss of IPv6 communication rather than a host crash.

CVSS severity7.5
High
EPSS probability2.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Apple Mac OS X releases from 2012 and earlier allows remote attackers to interrupt IPv6 connectivity on the local network. The IPv6 implementation processes a flood of ICMPv6 Router Advertisement packets containing multiple routing entries until neighbor discovery stops responding. Remote attackers must share the target's local network, and the demonstrated consequence is loss of IPv6 communication rather than a host crash.

The record

CVE
CVE-2012-5366
Published
Feb 20, 2020
Updated
Aug 6, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.002
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:C
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.002Endpoint Denial of Service: Service Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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