Threats / Microsoft / CVE-2015-1671
CVE-2015-1671
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft Windows vulnerability
Remote code execution vulnerability in Windows and related components through improper TrueType font handling. Actively exploited in the wild with high EPSS score.
Verdict
Today item — known-exploited.
An attacker can execute arbitrary code remotely by crafting malicious TrueType fonts processed by vulnerable Windows components, .NET Framework, Office, Lync, or Silverlight. Active exploitation in the wild indicates immediate risk to unpatched systems.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
5 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-25).
Probability (EPSS)
EPSS 0.54628 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Microsoft, Windows. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-19 CWE-19.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
WeaknessCWE-19 · CWE-19
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
Craft a malicious TrueType font file with embedded code execution payload
Business
Attacker gains ability to run arbitrary code with privileges of the affected application or user
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
Distribute the font through email, web content, or document embedding to target users
Business
Widespread compromise of user systems and potential lateral movement within enterprise networks
3
Lateral reach — past segmentation narrative 3
Attacker
Execute code upon font rendering by vulnerable application components
Business
Complete system compromise, data theft, malware installation, and operational disruption
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05