Which products and versions are affected by CVE-2010-0477?

Affected: Windows 7 (Microsoft); Windows Server 2008 (Microsoft). The full list is in the CVE brief.

Is CVE-2010-0477 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2010-0477 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2010-0477?

Public exploit code is available.

Is there a fix for CVE-2010-0477?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2010-0477 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2010-0477

CriticalPublic exploit

Published Apr 14, 2010 · Updated Apr 28, 2026

Key Facts

Patch immediately

CVE-2010-0477 is a critical-severity vulnerability (CVSS 10.0 v2) affecting Windows 7 (Microsoft), Windows Server 2008 (Microsoft).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 50% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v2

10.0

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

EPSS (30-day exploit likelihood)

50%

Higher than 98.8% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2010-0477 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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

4 affected entries in total

Product	Affected versions	Fixed in
Windows 7Microsoft	See advisory	n/a
Windows Server 2008Microsoft	See advisory	n/a

Timeline

Publicly disclosed
Apr 14, 2010
Last updated
Apr 28, 2026

Weakness Type

CWE-399

References

FAQ

Common Questions.

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 improp…
Affected: Windows 7 (Microsoft); Windows Server 2008 (Microsoft). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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