PT-2021-4671 · Microsoft · Windows Scripting Engine+2

Published 2021-07-13 · Updated 2025-10-29 · CVE-2021-34448

Positive Technologies (AI Summary)

CVSS v2.0

9.3

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Microsoft Windows Scripting Engine (affected versions not specified)

Description The issue is related to a memory corruption vulnerability in the Scripting Engine, which can be exploited by an attacker to execute arbitrary code or cause a denial of service. This can be achieved through a specially crafted web page. The vulnerability is associated with a buffer overflow in memory when processing HTML content.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-119

CWE-787

Related Identifiers

BDU:2021-05364

BDU:2021-05652

CVE-2021-34448

Affected Products

Internet Explorer

Windows Scripting Engine

Windows

References · 19

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34448 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-05652 · Security Note
• https://bdu.fstec.ru/vul/2021-05364 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-34448 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34448 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-34448 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-34448 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/667114 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34448 · Security Note
• https://t.me/cvenotify/112278 · Telegram Post
• https://t.me/cvenotify/87604 · Telegram Post
• https://t.me/true_secator/1917 · Telegram Post
• https://cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-34448 · Note
• https://t.me/cvenotify/18016 · Telegram Post
• https://cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv · Note