⚠ Actively exploited
Added to CISA KEV on 2021-11-03. Federal agencies required to patch by 2021-11-17. Required action: Apply updates per vendor instructions..

CVE-2021-34448 — Out-of-bounds Write in Microsoft Windows 10 Version 1507

CWE-787 — Out-of-bounds Write7 documents6 sources
Severity
6.8MEDIUMCNA
CISA8.8
No vector
EPSS
2.0%
top 16.16%
CISA KEV
KEV
Added 2021-11-03
Due 2021-11-17
Exploit
Exploited in wild
Active exploitation observed
Affected products
15
Microsoft Windows 10 Version 1507Microsoft Windows 10 Version 1607Microsoft Windows 10 Version 1809+12 more
Timeline
PublishedJul 16
KEV addedNov 3
KEV dueNov 17
Latest updateApr 1
CISA Required Action: Apply updates per vendor instructions.

Description

Scripting Engine Memory Corruption Vulnerability Scripting Engine Memory Corruption Vulnerability

Affected Packages15 packages

▶CVEListV5microsoft/windows_76.1.0 — 6.1.7601.25661+1
▶CVEListV5microsoft/windows_8.16.3.0 — 6.3.9600.20069+1
▶CVEListV5microsoft/windows_server_20126.2.0 — 6.2.9200.23409+1
▶CVEListV5microsoft/windows_server_201610.0.0 — 10.0.14393.4530
▶CVEListV5microsoft/windows_server_201910.0.0 — 10.0.17763.2061

🔴Vulnerability Details

3
Project0
The More You Know, The More You Know You Don’t Know - Project Zero↗2022-04-01
▶
CVEList
Scripting Engine Memory Corruption Vulnerability↗2021-07-16
▶
VulnCheck
Microsoft Windows Scripting Engine Memory Corruption Vulnerability↗2021
▶

📋Vendor Advisories

2
CISA
Microsoft Windows Scripting Engine Memory Corruption Vulnerability↗2021-11-03
▶
Microsoft
Scripting Engine Memory Corruption Vulnerability↗2021-07-13
▶

🕵️Threat Intelligence

2
Qualys
Microsoft and Adobe Patch Tuesday (July 2021) – Microsoft 117 Vulnerabilities with 13 Critical, Adobe 26 Vulnerabilities | Qualys↗2021-07-13
▶
Qualys
Microsoft and Adobe Patch Tuesday (July 2021) – Microsoft 117 Vulnerabilities with 13 Critical, Adobe 26 Vulnerabilities↗2021-07-13
▶
CVE-2021-34448 — Out-of-bounds Write in Microsoft | cvebase