Vulnerability Monitor

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CVE-2021-34448

Scripting Engine Memory Corruption Vulnerability

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.8, indicating it can be exploited remotely over the network but requires specific conditions to be met though user interaction is required and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), for affected systems. Impacting 14 products from microsoft, from microsoft, from microsoft and 11 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2021-07-16T21:15:09.580

Last Modified

2025-10-29T16:46:59.910

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 6.8 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

8.6

Impact Score

10.0

Weaknesses

Type: Primary
CWE-787
Type: Secondary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	microsoft	windows_10_1507	< 10.0.10240.19003	Yes
Operating System	microsoft	windows_10_1607	< 10.0.14393.4530	Yes
Operating System	microsoft	windows_10_1809	< 10.0.17763.2061	Yes
Operating System	microsoft	windows_10_1909	< 10.0.18363.1679	Yes
Operating System	microsoft	windows_10_2004	< 10.0.19041.1110	Yes
Operating System	microsoft	windows_10_20h2	< 10.0.19042.1110	Yes
Operating System	microsoft	windows_10_21h1	< 10.0.19043.1110	Yes
Operating System	microsoft	windows_7	-	Yes
Operating System	microsoft	windows_8.1	-	Yes
Operating System	microsoft	windows_rt_8.1	-	Yes
Operating System	microsoft	windows_server_2008	r2	Yes
Operating System	microsoft	windows_server_2012	-	Yes
Operating System	microsoft	windows_server_2012	r2	Yes
Operating System	microsoft	windows_server_2016	< 10.0.14393.4530	Yes
Operating System	microsoft	windows_server_2019	< 10.0.17763.2061	Yes

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34448 Patch, Vendor Advisory ([email protected])
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34448 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-34448 US Government Resource (134c704f-9b21-4f2e-91b3-4a467353bcc0)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For microsoft's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.