Threats / Microsoft / CVE-2013-3893
CVE-2013-3893
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft Internet Explorer vulnerability
Microsoft Internet Explorer memory corruption vulnerability enabling remote code execution. Actively exploited in the wild with high exploitation likelihood.
Verdict
Today item — known-exploited.
Memory corruption flaw in Internet Explorer allows unauthenticated remote attackers to execute arbitrary code through crafted content. Active exploitation observed. Affected versions are end-of-life; immediate discontinuation recommended.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
8 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 2025-08-12).
Probability (EPSS)
EPSS 0.8593 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Microsoft, Internet Explorer. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-399 Resource Management Errors — weakness family: Resource / availability.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
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
I craft malicious web content designed to trigger memory corruption in Internet Explorer's rendering engine.
Business
Users visiting attacker-controlled or compromised websites face arbitrary code execution on their systems without authentication or user interaction.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I deliver the exploit payload through email attachments, drive-by downloads, or watering hole attacks targeting organizations still using legacy Internet Explorer.
Business
Compromised endpoints become entry points for lateral movement, data exfiltration, and persistent network compromise across enterprise infrastructure.
3
Lateral reach — past segmentation narrative 3
Attacker
I establish command and control access on victim machines to deploy secondary payloads or maintain persistence.
Business
Organizations face operational disruption, regulatory compliance violations, and incident response costs while managing widespread system compromise.
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