Information disclosure in Microsoft Internet Explorer
CVE-2016-3321
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."
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.5 (Low). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.361 (98.4th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.353 · newest: 0.361 · change: +0.008
Affected products
- Microsoft Internet Explorer — versions 10, 11
Weakness classification (CWE)
Public proof-of-concept exploits
References
- docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-095 (vendor-advisory)
- www.securitytracker.com/id/1036562 (vdb-entry)
- www.securify.nl/advisory/SFY20160301/internet_explorer_iframe_sandbox_local_fil… (VDB Entry, Third Party Advisory)
- seclists.org/fulldisclosure/2016/Aug/44 (mailing-list, Mailing List, Third Party Advisory)
- www.securityfocus.com/archive/1/539174/100/0/threaded (mailing-list)
- www.securityfocus.com/bid/92291 (vdb-entry)
Frequently asked questions
- What is CVE-2016-3321?
- CVE-2016-3321 is a low-severity vulnerability in Microsoft Internet Explorer, classified under Information Disclosure. CVSS score: 2.5/10. Published 2016-08-09.
- How severe is CVE-2016-3321?
- Low severity. CVSS v3 base score is 2.5 out of 10.
- Is CVE-2016-3321 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.