How severe is CVE-2014-4123?

CVE-2014-4123 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2014-4123 being actively exploited?

Yes. CVE-2014-4123 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-25, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2014-4123?

CVE-2014-4123 primarily affects Microsoft Internet Explorer. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-4123?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2014-4123 have an EU (EUVD) identifier?

Yes. CVE-2014-4123 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2014-4054. It is also flagged as exploited in the EUVD (since 2022-05-25).

When was CVE-2014-4123 published?

CVE-2014-4123 was published on 2014-10-15 and last updated on 2026-06-17.

CVE-2014-4123

CVE-2014-4123 is a high-severity vulnerability in Microsoft Internet Explorer with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-05-25).

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 40% (98th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-05-25)
EU (EUVD) id: EUVD-2014-4054
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-05-25)
Affected product: Microsoft Internet Explorer
Published: 2014-10-15
Last modified: 2026-06-17

Description

Microsoft Internet Explorer 7 through 11 allows remote attackers to gain privileges via a crafted web site, aka "Internet Explorer Elevation of Privilege Vulnerability," as exploited in the wild in October 2014, a different vulnerability than CVE-2014-4124.

Frequently asked questions

What is CVE-2014-4123?: Microsoft Internet Explorer 7 through 11 allows remote attackers to gain privileges via a crafted web site, aka "Internet Explorer Elevation of Privilege Vulnerability," as exploited in the wild in October 2014, a different vulnerability than CVE-2014-4124.
How severe is CVE-2014-4123?: CVE-2014-4123 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2014-4123 being actively exploited?: Yes. CVE-2014-4123 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2014-4123?: CVE-2014-4123 primarily affects Microsoft Internet Explorer. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-4123?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2014-4123 have an EU (EUVD) identifier?: Yes. CVE-2014-4123 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2014-4054. It is also flagged as exploited in the EUVD (since 2022-05-25).
When was CVE-2014-4123 published?: CVE-2014-4123 was published on 2014-10-15 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:9:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:10:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:11:*:*:*:*:*:*:*

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