CVE-2016-3321
Microsoft Internet Explorer 10 and 11 load different files for attempts to open a file:// URL...
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."
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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."
- Record
CVE-2016-3321- CVSS 3.0
- 2.5 Low
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 1.9 Low
AV:L/AC:M/Au:N/C:P/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
CVE List No score
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."
- Record
CVE-2016-3321- Updated
- 2026-11-02
EUVDEUVD-2016-4353 No score
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."
- Record
EUVD-2016-4353- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q89r-f728-w9pv
Microsoft Internet Explorer 10 and 11 load different files for attempts to open a file:// URL...
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."
- Record
GHSA-q89r-f728-w9pv- CVSS 3.0
- 2.5 Low
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Metasploit | Internet Explorer Iframe Sandbox File Name Disclosure Vulnerability | 2016-08-09 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, Metasploit, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2016-3321 is a low vulnerability (CVSS 2.5) in Microsoft Internet Explorer, published August 9, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 37.9%, the 98th percentile. No source names a fixed version.
References
docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-095
securitytracker.com/id/1036562
securify.nl/advisory/SFY20160301/internet_explorer_iframe_sandbox_local_file_name_disclosure_vulnerability.html
seclists.org/fulldisclosure/2016/Aug/44
securityfocus.com/archive/1/539174/100/0/threaded
nvd.nist.gov/vuln/detail/CVE-2016-3321
github.com/advisories/GHSA-q89r-f728-w9pv