What is CVE-2016-3383?

CVE-2016-3383 is a high-severity vulnerability in Microsoft Internet Explorer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2016-10-14.

How severe is CVE-2016-3383?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Microsoft Internet Explorer

CVE-2016-3383

Microsoft Internet Explorer 10 and 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Microsoft Browser Memory Corruption Vulnerability."

Vulnerability class: Buffer Overflow

Published 2016-10-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.136 (96.3th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.136 · newest: 0.136 · change: 0.000

Affected products

Microsoft Internet Explorer — versions 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/ms16-118 (vendor-advisory)
www.securityfocus.com/bid/93396 (vdb-entry)
www.securitytracker.com/id/1036992 (vdb-entry)

Frequently asked questions

What is CVE-2016-3383?: CVE-2016-3383 is a high-severity vulnerability in Microsoft Internet Explorer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2016-10-14.
How severe is CVE-2016-3383?: High severity. CVSS v3 base score is 7.5 out of 10.