Which products and versions are affected by CVE-2014-0307?

Affected: Internet Explorer (Microsoft) versions 9. The full list is in the CVE brief.

Is CVE-2014-0307 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2014-0307 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2014-0307?

Public exploit code is available.

Is there a fix for CVE-2014-0307?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2014-0307 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2014-0307

CriticalPublic exploit

Use-after-free vulnerability in Microsoft Internet Explorer 9 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a certain sequence of manipulations of a TextRange element, aka "Internet Explorer Memory Corruption…

Published Mar 12, 2014 · Updated May 6, 2026

Key Facts

Patch immediately

CVE-2014-0307 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Internet Explorer (Microsoft).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 69% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v2

9.3

AV:N/AC:M/Au:N/C:C/I:C/A:C

EPSS (30-day exploit likelihood)

69%

Higher than 99.3% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2014-0307 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
Internet ExplorerMicrosoft	9	n/a

Timeline

Publicly disclosed
Mar 12, 2014
Last updated
May 6, 2026

Weakness Type

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-416 Use After Free

References

FAQ

Common Questions.

Use-after-free vulnerability in Microsoft Internet Explorer 9 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a certain sequence of manipulations of a TextRange element, aka "Internet Explorer Memory Corruption Vulnerability."
Affected: Internet Explorer (Microsoft) versions 9. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2014-0307 Running On Your Attack Surface?

Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.