Security readout for executives and security teams
Plain-English summary
This is a Microsoft font-parsing remote code execution flaw. A crafted TrueType font could make affected Microsoft software run attacker-controlled code. Because CISA lists CVE-2015-1671 in KEV, treat exposure on legacy Windows, Office, Lync, Live Meeting, .NET, or Silverlight systems as urgent.
Executive priority
Prioritize remediation for legacy Microsoft endpoints and collaboration systems. KEV status means this should not remain in backlog, especially where users handle external documents, email attachments, or browser-delivered content.
Technical view
The vulnerability is in Windows DirectWrite as used by affected Microsoft .NET Framework, Office, Lync, Live Meeting, and Silverlight versions. Processing a malicious TrueType font can allow arbitrary code execution. The source bundle indicates user interaction is required and Microsoft addressed it in MS15-044.
Likely exposure
Highest exposure is legacy Microsoft desktop or server environments running affected Office 2007/2010, Lync, Live Meeting, Silverlight 5, or .NET Framework versions that can process untrusted fonts, documents, or web content.
Exploitation context
CISA KEV inclusion supports known exploitation. The provided sources do not include exploit details, current campaign details, or evidence that every affected product is equally targeted.
Researcher notes
The bundle identifies broad affected product families but does not provide KB mappings, exploit primitives, or detection indicators. Use MS15-044 and asset evidence to map exact exposure, then validate patch state rather than assuming all Microsoft installations are vulnerable.
Mitigation direction
- Apply Microsoft MS15-044 security updates where applicable.
- Update Silverlight to at least 5.1.40416.00 or remove it if unnecessary.
- Inventory affected Office, Lync, Live Meeting, .NET Framework, and Silverlight installations.
- Retire unsupported legacy Microsoft software where patching is unavailable.
- Check current Microsoft guidance for product-specific update paths.
Validation and detection
- Confirm MS15-044 updates are installed on affected Windows systems.
- Verify Silverlight versions are 5.1.40416.00 or later.
- Search asset inventory for affected Office, Lync, Live Meeting, and .NET versions.
- Prioritize systems processing email attachments, documents, or web content.
- Review vulnerability scanner results against CVE-2015-1671.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2015-1671 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- MS15-044CVE reference · vendor-advisory, x_refsource_MS
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-1671CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.