CVE-2016-3321

What it is

Microsoft 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."

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. Limited direct impact.

Exploit odds

37.9% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2016-08-09 21:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 00:45 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 37.9% in the next 30 days (EPSS).
• Severity: 2.5 LOW (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2016-08-09 21:59 UTC

Last modified

2026-06-17 00:45 UTC

Exploit probability

37.9% · EPSS, next 30 days

Weakness

CWE-200 · Information exposure

Record status

Modified

Affected

• Microsoft Internet Explorer 10
• Microsoft Internet Explorer 11

Attack profile CVSS 3.0 · 2.5

Attack vector

Local

Complexity

High

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2016-3321.md and follow it. Check whether this project is affected by CVE-2016-3321. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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