What is CVE-2016-0191?

CVE-2016-0191 is a high-severity vulnerability in Microsoft Edge, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2016-05-11.

How severe is CVE-2016-0191?

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

Buffer overflow in Microsoft Edge

CVE-2016-0191

The Chakra JavaScript engine in Microsoft Edge allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Scripting Engine Memory Corruption Vulnerability," a different vulnerability than CVE-2016-0186 and CVE-2016-0193.

Vulnerability class: Buffer Overflow

Published 2016-05-11 · 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: 0.283 (98.1th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.283 · newest: 0.283 · change: 0.000

Affected products

Microsoft Edge

Weakness classification (CWE)

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

References

www.zerodayinitiative.com/advisories/ZDI-16-282
www.securitytracker.com/id/1035821 (vdb-entry)
docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-052 (vendor-advisory)
www.securityfocus.com/bid/90010 (vdb-entry)

Frequently asked questions

What is CVE-2016-0191?: CVE-2016-0191 is a high-severity vulnerability in Microsoft Edge, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2016-05-11.
How severe is CVE-2016-0191?: High severity. CVSS v3 base score is 7.5 out of 10.