What is CVE-2020-17053?

CVE-2020-17053 is a high-severity vulnerability in Microsoft Internet Explorer, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2020-11-11.

How severe is CVE-2020-17053?

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

Buffer overflow in Microsoft Internet Explorer

CVE-2020-17053

Internet Explorer Memory Corruption Vulnerability

Vulnerability class: Buffer Overflow

Published 2020-11-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.032 (87.6th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000

Affected products

Microsoft Internet Explorer — versions 11
Microsoft Internet Explorer 11 — versions 1.0.0
Microsoft Windows 10 — versions 20h2, 1803, 1809
Microsoft Windows Server 2019

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17053 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2020-17053?: CVE-2020-17053 is a high-severity vulnerability in Microsoft Internet Explorer, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2020-11-11.
How severe is CVE-2020-17053?: High severity. CVSS v3 base score is 7.5 out of 10.