CVE-2016-3321

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Summary

CVECVE-2016-3321
StatePUBLISHED
Assignermicrosoft
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-08-09 21:59:28 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionMicrosoft Internet Explorer 10 and 11 load different files for attempts to open a file:// URL depending on whether the file exists, which allows local users to enumerate files via vectors involving a file:// URL and an HTML5 sandbox iframe, aka "Internet Explorer Information Disclosure Vulnerability."

Risk And Classification

Primary CVSS: v3.0 2.5 LOW from [email protected]

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.353310000 probability, percentile 0.982820000 (date 2026-07-22)

Problem Types: CWE-200 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary2.5LOWCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
2.0[email protected]Primary1.9AV:L/AC:M/Au:N/C:P/I:N/A:N

CVSS v3.0 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Microsoft Internet Explorer 10 All All All
Application Microsoft Internet Explorer 11 - All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Microsoft Security Bulletin MS16-095 - Critical | Microsoft Docs af854a3a-2127-422b-91ae-364da2661108 docs.microsoft.com
Full Disclosure: Internet Explorer iframe sandbox local file name disclosure vulnerability af854a3a-2127-422b-91ae-364da2661108 seclists.org Mailing List, Third Party Advisory
Microsoft Internet Explorer CVE-2016-3321 Local Information Disclosure Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Securify - security advisories - Internet Explorer iframe sandbox local file name disclosure vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securify.nl Third Party Advisory, VDB Entry
SecurityFocus af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Microsoft Internet Explorer Multiple Flaws Let Remote Users Obtain Potentially Sensitive Information and Execute Arbitrary Code - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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