Threats / Microsoft / CVE-2014-4123
CVE-2014-4123
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft Internet Explorer vulnerability
Microsoft Internet Explorer contains an unspecified privilege escalation vulnerability exploitable through crafted web sites. The vulnerability has been observed in active exploitation.
Verdict
Today item — known-exploited.
Remote attackers can exploit this vulnerability by hosting or injecting malicious web content to gain elevated privileges on affected systems. Active exploitation in the wild indicates practical weaponization.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
3 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 0.40289 — 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-264 Permissions/Privileges/Access Control — weakness family: Authorization / access control.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 a malicious web site or inject content into a legitimate site to trigger the vulnerability when visited.
Business
User browsing activity becomes a direct attack vector, requiring security controls beyond traditional perimeter defenses.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I exploit the unspecified flaw in Internet Explorer to escape the browser sandbox and gain system-level privileges.
Business
Compromised user accounts escalate to administrative control, enabling lateral movement and persistent access across the network.
3
Lateral reach — past segmentation narrative 3
Attacker
I use elevated privileges to install malware, steal credentials, or establish persistence mechanisms.
Business
Confidentiality, integrity, and availability of systems and data are compromised; incident response and remediation costs escalate significantly.
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