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Vulnerability record · CVE-2013-3183 · published 14 August 2013

CVE-2013-3183: Microsoft Windows TCP/IP ICMPv6 memory allocation flaw causes system hang

Microsoft · Windows 7

The TCP/IP stack in multiple Microsoft Windows versions does not properly allocate memory for inbound ICMPv6 packets. A remote attacker can send crafted ICMPv6 packets to hang the affected system. The flaw affects Windows Vista SP2, Server 2008 SP2/R2 SP1, Windows 7 SP1, Windows 8, Server 2012, and Windows RT.

7.8 CVSS 2.0 High EPSS 78% · top 0.4% CWE-119 · Memory buffer overflow
7.8CVSS 2.0 base score
78%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

The TCP/IP implementation in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT does not properly perform memory allocation for inbound ICMPv6 packets, which allows remote attackers to cause a denial of service (system hang) via crafted packets, aka "ICMPv6 Vulnerability."

AV:N/AC:L/Au:N/C:N/I:N/A:C

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 18 September 2026. Confidence: medium.

high priorityRemote unauthenticated denial of service with complete availability impact and very high EPSS, though no KEV listing or confirmed in-the-wild exploitation is documented.

What it is

The TCP/IP stack in multiple Microsoft Windows versions does not properly allocate memory for inbound ICMPv6 packets. A remote attacker can send crafted ICMPv6 packets to hang the affected system. The flaw affects Windows Vista SP2, Server 2008 SP2/R2 SP1, Windows 7 SP1, Windows 8, Server 2012, and Windows RT.

Impact

An unauthenticated remote attacker can cause a denial of service by hanging the target system, disrupting availability. There is no reported confidentiality or integrity impact.

Attack surface

Reachable over the network via ICMPv6 packets sent to the affected host; no authentication or user interaction is required per the AV:N/AC:L/Au:N vector.

Exploitation

Not listed in CISA KEV and no public exploit references are tagged in the record, but EPSS is very high at 0.78243 (99.555th percentile), indicating elevated predicted exploitation activity.

What to do

  • Apply the Microsoft security update MS13-065 for all affected Windows versions.
  • Upgrade or migrate off unsupported or legacy Windows versions where possible.
  • Restrict inbound ICMPv6 traffic at network boundaries and host firewalls where operationally feasible.
  • Monitor vendor advisories and US-CERT TA13-225A for updated guidance.

Detection

  • Monitor for unexpected system hangs or reboots on affected Windows hosts.
  • Inspect network traffic for anomalous or malformed ICMPv6 packets targeting Windows systems.
  • Correlate host availability alerts with ICMPv6 traffic spikes from external sources.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.us-cert.gov/ncas/alerts/TA13-225A Third Party AdvisoryUS Government Resource
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-065
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17918
http://www.us-cert.gov/ncas/alerts/TA13-225A Third Party AdvisoryUS Government Resource
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-065
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17918

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Source: NIST National Vulnerability Database (record CVE-2013-3183), CISA KEV, FIRST EPSS (scores of 2026-09-25). This page is refreshed as NVD updates the record.