Is CVE-2014-1776 in the CISA KEV catalog?

Yes. CVE-2014-1776 is on the CISA Known Exploited Vulnerabilities list, added 2022-01-28.

What is the CVSS severity of CVE-2014-1776?

CVE-2014-1776 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2014-1776?

CVE-2014-1776 has an EPSS score of 88.01% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2014-1776?

No published fix for CVE-2014-1776 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2022-07-28. Apply the vendor's mitigations per CISA's guidance.

CVE & CISA-KEV Catalog

CVE-2014-1776

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

Description

Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014. NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that "VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks."

CWE-416Use After Free

How to fix

Actively exploited, no published fix found yet

CISA required action: Apply updates per vendor instructions.

Federal remediation due: 2022-07-28

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

88.01%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Microsoft Internet Explorer Memory Corruption Vulnerability

Microsoft Internet Explorer contains a memory corruption vulnerability that allows remote attackers to execute code in the context of the current user.

Apply updates per vendor instructions.

Remediation due: 2022-07-28

References

Patch2

Exploit1

signalsec.com

Mitigation2

Third-Party Advisory4

Government Resource1

cisa.gov

Other references3

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-21.