The SMB client in Microsoft Windows Server 2008 R2 and Windows 7 does not properly handle (1) SMBv1 and (2) SMBv2 response packets, which allows remote SMB servers and man-in-the-middle attackers to execute arbitrary code via a crafted packet that causes the client to read the entirety of the response, and then improperly interact with the Winsock Kernel (WSK), aka "SMB Client Message Size Vulnerability."
Published Apr 14, 2010
10.0
HIGHCVSS 2.0
EPSS 50.19%
Description
The SMB client in Microsoft Windows Server 2008 R2 and Windows 7 does not properly handle (1) SMBv1 and (2) SMBv2 response packets, which allows remote SMB servers and man-in-the-middle attackers to execute arbitrary code via a crafted packet that causes the client to read the entirety of the response, and then improperly interact with the Winsock Kernel (WSK), aka "SMB Client Message Size Vulnerability."
Affected products
No data.
Configuration 2
- n/a
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (25 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 50.19% (0.50186) | 98.87th | v5 (v2026.06.15) |
| Jun 15, 2026 | 50.19% (0.50186) | 98.76th | v5 (v2026.06.15) |
| Dec 12, 2025 | 86.38% (0.86378) | 99.37th | v4 (v2025.03.14) |
| Mar 30, 2025 | 82.29% (0.82289) | 99.18th | v4 (v2025.03.14) |
| Mar 29, 2025 | 87.69% (0.87688) | 99.34th | v4 (v2025.03.14) |
| Mar 19, 2025 | 82.29% (0.82289) | 99.17th | v4 (v2025.03.14) |
| Mar 17, 2025 | 80.47% (0.80467) | 99.09th | v4 (v2025.03.14) |
| Jan 2, 2025 | 88.86% (0.88857) | 98.97th | v3 (v2023.03.01) |
| Dec 17, 2024 | 87.64% (0.87636) | 98.90th | v3 (v2023.03.01) |
| Dec 12, 2024 | 84.93% (0.84931) | 98.63th | v3 (v2023.03.01) |
| Oct 12, 2024 | 84.64% (0.84641) | 98.57th | v3 (v2023.03.01) |
| Aug 31, 2024 | 89.58% (0.89583) | 98.84th | v3 (v2023.03.01) |
| Jun 1, 2024 | 92.62% (0.92616) | 98.99th | v3 (v2023.03.01) |
| Mar 2, 2024 | 93.65% (0.93654) | 99.05th | v3 (v2023.03.01) |
| Jan 18, 2024 | 94.13% (0.94128) | 98.99th | v3 (v2023.03.01) |
| Dec 6, 2023 | 95.16% (0.95162) | 99.14th | v3 (v2023.03.01) |
| Jul 29, 2023 | 95.84% (0.95837) | 99.18th | v3 (v2023.03.01) |
| Jun 15, 2023 | 96.19% (0.96185) | 99.25th | v3 (v2023.03.01) |
| May 1, 2023 | 95.94% (0.95941) | 99.13th | v3 (v2023.03.01) |
| Mar 13, 2023 | 96.60% (0.96602) | 99.32th | v3 (v2023.03.01) |
| Mar 7, 2023 | 96.88% (0.96875) | 99.45th | v3 (v2023.03.01) |
| Mar 6, 2023 | 39.71% (0.39711) | 98.13th | v2 (v2022.01.01) |
| Jan 3, 2023 | 39.71% (0.39711) | 98.08th | v2 (v2022.01.01) |
| Aug 21, 2022 | 43.29% (0.43293) | 98.20th | v2 (v2022.01.01) |
| Feb 4, 2022 | 45.26% (0.45255) | 97.80th | v2 (v2022.01.01) |
References (4)
- http://secunia.com/advisories/39372 third-party-advisoryx_refsource_SECUNIA
- http://www.us-cert.gov/cas/techalerts/TA10-103A.html third-party-advisoryx_refsource_CERTUS Government Resource
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-020 vendor-advisoryx_refsource_MS
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6859 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/39372 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.us-cert.gov/cas/techalerts/TA10-103A.html | third-party-advisoryx_refsource_CERTUS Government Resource | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-020 | vendor-advisoryx_refsource_MS | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6859 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.