Vulnerability record

CVE-2016-3351

Microsoft Internet Explorer and Edge Information Disclosure Vulnerability

ElevatedExploitation confirmedCISA KEV Used by ransomware

What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Internet Explorer and Edge, fix it now.

CISA required action: Apply updates per vendor instructions.

US federal civilian agencies must remediate by Jun 14, 2022.

Patch status

Official fix available since Sep 30, 2026

Apply the vendor's update to every affected system. Check the fixed-in versions below where known.

Basis: NVD patch reference

Description

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."

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

Products affected by this vulnerability, with versions and the source of each entry
Product	Vendor	Affected versions	Source
Internet Explorer	Microsoft	9; 10; 11	NVD
Internet Explorer and Edge	Microsoft	—	KEV
Microsoft Edge	Microsoft	all versions	NVD

Sources: NVD = NIST National Vulnerability Database; KEV = CISA Known Exploited Vulnerabilities catalog.

Intelligence timeline

Developments from the last 30 days, newest first.

CVSS scoredUpdateKEVSep 30, 2026
CVE-2016-3351 scored CVSS 6.5: Microsoft Internet Explorer and Edge, Microsoft Internet Explorer and Edge Information Disclosure Vulnerability
CISA lists this as exploited in the wild and known to be used in ransomware campaigns. Unpatched Internet Explorer and Edge systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
Patch releasedUpdateKEVSep 30, 2026
Patch released for CVE-2016-3351: Microsoft Internet Explorer and Edge, Microsoft Internet Explorer and Edge Information Disclosure Vulnerability
An official fix is now available for Microsoft Internet Explorer and Edge. This vulnerability is being exploited, so apply it promptly.
Basis: NVD patch reference

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2016-3351
securityfocus.com http://www.securityfocus.com/bid/92788
securitytracker.com http://www.securitytracker.com/id/1036788
securitytracker.com http://www.securitytracker.com/id/1036789
docs.microsoft.com https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-104
docs.microsoft.com https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-105
brokenbrowser.com https://www.brokenbrowser.com/detecting-apps-mimetype-malware/
cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-3351