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Vulnerability record · CVE-2010-0239 · published 10 February 2010

CVE-2010-0239: Windows TCP/IP ICMPv6 Router Advertisement bounds check flaw allows RCE

Microsoft · Windows Server 2008

The TCP/IP stack in Windows Vista and Server 2008 fails to properly bounds-check ICMPv6 Router Advertisement packets when IPv6 is enabled. A remote, unauthenticated attacker can send crafted packets to trigger memory corruption and execute arbitrary code. Because the flaw is in the kernel network stack, it is reachable without any user action.

10.0 CVSS 2.0 High EPSS 61% · top 0.9% CWE-94 · Code injection
10.0CVSS 2.0 base score
61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

The TCP/IP implementation in Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2, when IPv6 is enabled, does not properly perform bounds checking on ICMPv6 Router Advertisement packets, which allows remote attackers to execute arbitrary code via crafted packets, aka "ICMPv6 Router Advertisement Vulnerability."

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

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 19 September 2026. Confidence: high.

critical priorityCVSS 10.0 with network reachability, no authentication, and full code execution impact, combined with a very high EPSS score.

What it is

The TCP/IP stack in Windows Vista and Server 2008 fails to properly bounds-check ICMPv6 Router Advertisement packets when IPv6 is enabled. A remote, unauthenticated attacker can send crafted packets to trigger memory corruption and execute arbitrary code. Because the flaw is in the kernel network stack, it is reachable without any user action.

Impact

Successful exploitation gives the attacker arbitrary code execution at kernel privilege, leading to full system compromise. No authentication or user interaction is required.

Attack surface

Reachable over the network via ICMPv6 Router Advertisement packets when IPv6 is enabled on the target. The CVSS vector AV:N/AC:L/Au:N indicates no authentication and no user interaction are needed.

Exploitation

Not listed in CISA KEV and no ransomware associations are documented. EPSS is high (0.61273, 99.1st percentile), indicating elevated predicted exploitation likelihood, but the record contains no reference tags confirming public exploit code.

What to do

  • Apply Microsoft security bulletin MS10-009 (patch) to all affected Vista and Server 2008 systems.
  • Disable IPv6 on hosts that do not require it, or block inbound ICMPv6 Router Advertisement traffic at network boundaries.
  • Segment and firewall networks so untrusted hosts cannot send ICMPv6 Router Advertisements to protected systems.
  • Verify patch deployment with the OVAL definition referenced in the advisory.

Detection

  • Monitor for unexpected ICMPv6 Router Advertisement packets arriving from non-router or untrusted sources.
  • Alert on kernel crashes or memory corruption events on Vista/Server 2008 hosts with IPv6 enabled.
  • Audit hosts for IPv6 enablement and confirm patch status against MS10-009.

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

Affected products

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

References

LinkTags
http://www.us-cert.gov/cas/techalerts/TA10-040A.html US Government Resource
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-009
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8478
http://www.us-cert.gov/cas/techalerts/TA10-040A.html US Government Resource
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-009
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8478

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2010-0239), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.