How severe is CVE-2013-3903?

CVE-2013-3903 has a CVSS 2.0 base score of 4.7, rated medium severity.

Is CVE-2013-3903 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-3903?

CVE-2013-3903 primarily affects Microsoft Windows 8. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-3903?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-3903 published?

CVE-2013-3903 was published on 2013-12-11 and last updated on 2026-06-16.

CVE-2013-3903

CVE-2013-3903 is a medium-severity vulnerability in Microsoft Windows 8 with a CVSS 2.0 base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 4.7)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Microsoft Windows 8
Published: 2013-12-11
Last modified: 2026-06-16

Description

Array index error in win32k.sys in the kernel-mode drivers in Microsoft Windows 8, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allows local users to cause a denial of service (reboot) via a crafted TrueType font (TTF) file, aka "TrueType Font Parsing Vulnerability."

Frequently asked questions

What is CVE-2013-3903?: Array index error in win32k.sys in the kernel-mode drivers in Microsoft Windows 8, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allows local users to cause a denial of service (reboot) via a crafted TrueType font (TTF) file, aka "TrueType Font Parsing Vulnerability."
How severe is CVE-2013-3903?: CVE-2013-3903 has a CVSS 2.0 base score of 4.7, rated medium severity.
Is CVE-2013-3903 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-3903?: CVE-2013-3903 primarily affects Microsoft Windows 8. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-3903?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-3903 published?: CVE-2013-3903 was published on 2013-12-11 and last updated on 2026-06-16.

References

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-101

Affected products (8)

cpe:2.3:o:microsoft:windows_8:-:-:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_8:-:-:x86:*:*:*:*:*
cpe:2.3:o:microsoft:windows_rt:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:datacenter:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:essentials:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:standard:*:*:*

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