CVEs / CVE-2015-1671

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

Known exploited in the CISA KEV catalog since 25 May 2022
high 9.3 CVSS 2.0 (NVD)
EPSS 48.8% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
Last changed at its sources 17 Jun 2026

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Summary

A remote code execution vulnerability exists when components of Windows, .NET Framework, Office, Lync, and Silverlight fail to properly handle TrueType fonts.
CISA, Known Exploited Vulnerabilities catalog

Description

The Windows DirectWrite library, as used in Microsoft .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2; Office 2007 SP3 and 2010 SP2; Live Meeting 2007 Console; Lync 2010; Lync 2010 Attendee; Lync 2013 SP1; Lync Basic 2013 SP1; Silverlight 5 before 5.1.40416.00; and Silverlight 5 Developer Runtime before 5.1.40416.00, allows remote attackers to execute arbitrary code via a crafted TrueType font, aka "TrueType Font Parsing Vulnerability."
The CVE record, via NVD · published 13 May 2015 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
n/a n/a	n/a	—

Exploitation

In CISA KEV since	25 May 2022
Due date for US federal agencies	15 Jun 2022
Used in ransomware campaigns	Unknown
Required action	Apply updates per vendor instructions.

Severity

CVSS 2.0	9.3 high `AV:N/AC:M/Au:N/C:C/I:C/A:C` Scored by NVD

References

CVE-2015-1671 on NVD
CVE-2015-1671 in the CISA KEV catalog
http://www.securityfocus.com/bid/74490 Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1032281 Broken Link, Third Party Advisory, VDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-044 Patch, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-1671 US Government Resource

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.