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Vulnerability Intelligence

CVE-2013-3128

CriticalExploited

The kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT, and .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, and 4.5, allow remote attackers…

Published Oct 9, 2013 · Updated Apr 28, 2026

Key Facts

Patch immediately
  • CVE-2013-3128 is a critical-severity vulnerability (CVSS 9.3 v2) affecting .net Framework (Microsoft), Windows 7 (Microsoft), Windows 8 (Microsoft) and 6 more products.
  • It is exploited in the wild, listed in Industry KEV feed since Feb 22, 2021. No public exploit code is known.
  • 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 listed as exploited in the wild.

CVSS v2

9.3

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

EPSS (30-day exploit likelihood)

50%

Higher than 98.9% of all scored CVEs

Exploited in the wild

Yes

1 catalog listing

Public exploit code

None known

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Description

The kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT, and .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, and 4.5, allow remote attackers to execute arbitrary code via a crafted OpenType font (OTF) file, aka "OpenType Font Parsing Vulnerability."

Known-Exploited Catalog Listings

CatalogAddedRemediation dueRansomware use
Industry KEV feedFeb 22, 2021n/aNot reported

Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected Products

23 affected entries in total
ProductAffected versionsFixed in
.net FrameworkMicrosoft3.0-sp2, 3.5, 3.5.1, 4.0, 4.5n/a
Windows 7MicrosoftSee advisoryn/a
Windows 8MicrosoftSee advisoryn/a
Windows RtMicrosoftSee advisoryn/a
Windows Server 2003MicrosoftSee advisoryn/a
4 more affected products in the full CVE brief

Timeline

  1. Publicly disclosed

    Oct 9, 2013

  2. Added to Industry KEV feed

    Feb 22, 2021

  3. Last updated

    Apr 28, 2026

References

FAQ

Common Questions.

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