# CVE-2015-1671: Microsoft Windows Remote Code Execution Vulnerability

Source: https://junglewise.ai/threats/cve-2015-1671-microsoft-windows-remote-code-execution-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-25. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2015-1671 · Severity: critical · CVSS 9.3 · Exploited in the wild · Published 2022-05-25

A remote code execution vulnerability exists in the Microsoft Windows DirectWrite library when parsing crafted TrueType fonts. The flaw affects multiple Microsoft products including .NET Framework, Office, Lync, and Silverlight, allowing an attacker to execute arbitrary code if a user opens a specially crafted font file or visits a website with embedded fonts.

Technologies: [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2015-1671 exploited in the wild?** Yes. CVE-2015-1671 is known to be exploited in the wild, first recorded on 25 May 2022. Treat it as urgent.

**How severe is CVE-2015-1671?** Critical severity, with a CVSS score of 9.3, published 25 May 2022.

**Which products and versions are affected?** Microsoft DirectWrite; Microsoft .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, 4.5.2; Microsoft Office 2007 SP3, 2010 SP2; Microsoft Live Meeting 2007 Console; and 3 more.

**Is there a fix for CVE-2015-1671?** A patch was published on 2015-05-12: Microsoft released security bulletin MS15-044 to address the issue. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2015-1671 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2015-1671?** Check whether you run Microsoft Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft DirectWrite
- Microsoft .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, 4.5.2
- Microsoft Office 2007 SP3, 2010 SP2
- Microsoft Live Meeting 2007 Console
- Microsoft Lync 2010, 2010 Attendee, 2013 SP1, Basic 2013 SP1
- Microsoft Silverlight 5 before 5.1.40416.00
- Microsoft Silverlight 5 Developer Runtime before 5.1.40416.00

## Timeline

- 2015-05-12: patched: Microsoft released security bulletin MS15-044 to address the issue.
- 2022-05-25: kev added: Added to CISA's Known Exploited Vulnerabilities Catalog.
- 2022-05-25: disclosed

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