What is CVE-2016-3351?

CVE-2016-3351 is a medium-severity vulnerability in Microsoft Edge. CVSS score: 6.5/10. Published 2016-09-14.

How severe is CVE-2016-3351?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2016-3351 known to be exploited?

Yes. CVE-2016-3351 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-24), indicating it is being actively exploited. 5 public proof-of-concept repositories are indexed.

Vulnerability in Microsoft Edge

CVE-2016-3351

Microsoft Internet Explorer 9 through 11 and Microsoft Edge allow remote attackers to obtain sensitive information via a crafted web site, aka "Microsoft Browser Information Disclosure Vulnerability."

Published 2016-09-14 · last modified 2026-08-14.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.265 (98.0th percentile), scored 2026-10-18.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.263 · newest: 0.265 · change: +0.002

Affected products

Microsoft Edge
Microsoft Internet Explorer — versions 9, 10, 11
Microsoft Windows 10 1507
Microsoft Windows 10 1511
Microsoft Windows 10 1607
Microsoft Windows 7
Microsoft Windows 8.1
Microsoft Windows Rt 8.1
Microsoft Windows Server 2008 — versions r2
Microsoft Windows Server 2012 — versions r2

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-05-24. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-06-14.

Required action: Apply updates per vendor instructions.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

www.securitytracker.com/id/1036789 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
www.securityfocus.com/bid/92788 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
www.brokenbrowser.com/detecting-apps-mimetype-malware/ (Exploit)
docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-104 (vendor-advisory, Patch, Vendor Advisory)
docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-105 (vendor-advisory, Patch, Vendor Advisory)
www.securitytracker.com/id/1036788 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2016-3351?: CVE-2016-3351 is a medium-severity vulnerability in Microsoft Edge. CVSS score: 6.5/10. Published 2016-09-14.
How severe is CVE-2016-3351?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2016-3351 known to be exploited?: Yes. CVE-2016-3351 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-24), indicating it is being actively exploited. 5 public proof-of-concept repositories are indexed.