How severe is CVE-2014-4148?

CVE-2014-4148 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2014-4148?

Affected package information for CVE-2014-4148 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2014-4148?

No fixed version has been published for CVE-2014-4148 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2014-4148 actively exploited in the wild?

Yes. There are 3 known exploit references for CVE-2014-4148, including 3 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2014-4148?

CVE-2014-4148 has an EPSS (Exploit Prediction Scoring System) score of 55.7%, placing it in the 98th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2014-4148 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2014-4148 (Microsoft Windows Remote Code Execution Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2022-05-25. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-06-15. The required action was: Apply updates per vendor instructions. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2014-4148?

CVE-2014-4148 is classified as Code Injection (CWE-94). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Which products and versions are affected by CVE-2014-4148?

CVE-2014-4148 affects microsoft windows 7; microsoft windows 8; microsoft windows 8.1; microsoft windows rt, and 5 more product(s). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2014-4148 published, and has it been updated?

CVE-2014-4148 was published on October 15, 2014 and was last updated on April 22, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2022-05-25 — agencies required to remediate by 2022-06-15

CVE-2014-4148

HIGH

win32k.sys in the kernel-mode drivers in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server…

Published

Oct 15, 2014

Updated

Apr 22, 2026

Affected

0 pkgs

Patched

None yet

Exploits

3 known

EPSS Exploitation Probability

via FIRST.org ↗

55.7%probability of exploitation in next 30 days

High Risk98th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

win32k.sys in the kernel-mode drivers in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allows remote attackers to execute arbitrary code via a crafted TrueType font, as exploited in the wild in October 2014, aka "TrueType Font Parsing Remote Code Execution Vulnerability."

Affected Products

9 products · 11 configurations

windows 7microsoft

all

windows 8microsoft

all

windows 8.1microsoft

all

windows rtmicrosoft

all

windows rt 8.1microsoft

all

windows server 2003microsoft

all

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

win32k.sys in the kernel-mode drivers in Microsoft Windows Server 2003 S…

docs.microsoft.comGoogle-sheetOct 2014

win32k.sys in the kernel-mode drivers in Microsoft Windows Server 2003 S…

nvd.nist.govNVDFeb 2019

win32k.sys in the kernel-mode drivers in Microsoft Windows Server 2003 S…

cisa.govCISAMay 2022

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2014-4148 in your stack?

O3 detects CVE-2014-4148 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works

CVSS Score

8.8/10

CVSS v3 base score

Vector breakdown

AV:Attack Vector

Network

AC:Attack Complexity

Low

PR:Privileges Required

None

UI:User Interaction

Required

S:Scope

Unchanged

C:Confidentiality

High

I:Integrity

High

A:Availability

High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE Classification

CWE-94Code Injection

Weaponization

No known public exploit tooling found.

Timeline

First exploit

Oct 14, 2014

Disclosed

Oct 15, 2014

KEV added

May 25, 2022

Last updated

Apr 22, 2026

Identifiers

CVE-2014-4148

References

Advisorysecurityfocus.com Advisoryexchange.xforce.ibmcloud.com Advisorysecurityfocus.com Advisoryexchange.xforce.ibmcloud.com Fixdocs.microsoft.com Fixdocs.microsoft.com Webblogs.technet.com Websecunia.com Webblogs.technet.com Websecunia.com Webcisa.gov

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