Buffer overflow in Microsoft Windows 10 1507

CVE-2021-33742

Windows MSHTML Platform Remote Code Execution Vulnerability

Vulnerability class: Buffer Overflow

Published · last modified .

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: 0.594 (99.1th percentile), scored .

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-33742: held from 0.594 to 0.594.

EPSS over last 30 days · oldest: 0.594 · newest: 0.594 · change: 0.000

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: .

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-33742?
CVE-2021-33742 is a high-severity vulnerability in Microsoft Windows 10 1507, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2021-06-08.
How severe is CVE-2021-33742?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-33742 known to be exploited?
Yes. CVE-2021-33742 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 6 public proof-of-concept repositories are indexed.