Exploited vulnerability · CISA KEV

Is CVE-2016-0189 exploited? Yes: in CISA KEV since 28 Mar 2022

Gociux · Microsoft Internet Explorer · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2016-0189, Microsoft Internet Explorer Memory Corruption Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 28 Mar 2022, 2147 days after it was published. It is known to be used in ransomware campaigns. It affects Microsoft Internet Explorer. If you run it, CISA's required action is: Apply updates per vendor instructions.

What it is

The Microsoft JScript nd VBScript engines, as used in Internet Explorer and other products, allow attackers to execute remote code or cause a denial of service (memory corruption) via a crafted web site.

What to do

1. Check whether you run it. Look for Internet Explorer in your asset inventory, including appliances and cloud images. Stack check lists every exploited Microsoft CVE at once.
2. Apply the fix. Apply updates per vendor instructions.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 11 May 2016.
4. Get told next time. Email alerts when CISA adds a CVE for Microsoft.

Other exploited CVEs in Internet Explorer

• CVE-2010-0249: Microsoft Internet Explorer Use-After-Free Vulnerability (20 May 2026)
• CVE-2010-0806: Microsoft Internet Explorer Use-After-Free Vulnerability (20 May 2026)
• CVE-2010-3962: Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability (6 Oct 2025)
• CVE-2013-3893: Microsoft Internet Explorer Resource Management Errors Vulnerability (12 Aug 2025)
• CVE-2012-4792: Microsoft Internet Explorer Use-After-Free Vulnerability (23 Jul 2024)
• CVE-2013-3163: Microsoft Internet Explorer Memory Corruption Vulnerability (30 Mar 2023)

References

• nvd.nist.gov/vuln/detail/CVE-2016-0189

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in March 2022 · Microsoft scorecard · act-now radar.