What is CVE-2016-3211?

CVE-2016-3211 is a high-severity vulnerability in Microsoft Internet Explorer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2016-06-16.

How severe is CVE-2016-3211?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Microsoft Internet Explorer

CVE-2016-3211

Microsoft Internet Explorer 9 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Internet Explorer Memory Corruption Vulnerability," a different vulnerability than CVE-2016-0199 and CVE-2016-0200.

Vulnerability class: Buffer Overflow

Published 2016-06-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.318 (98.3th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.318 · newest: 0.318 · change: 0.000

Affected products

Microsoft Internet Explorer — versions 9, 10, 11

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-063 (vendor-advisory)
www.zerodayinitiative.com/advisories/ZDI-16-366
www.securitytracker.com/id/1036096 (vdb-entry)

Frequently asked questions

What is CVE-2016-3211?: CVE-2016-3211 is a high-severity vulnerability in Microsoft Internet Explorer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2016-06-16.
How severe is CVE-2016-3211?: High severity. CVSS v3 base score is 8.8 out of 10.