CVE-2021-34448
Scripting Engine Memory Corruption Vulnerability
Scripting Engine Memory Corruption Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Scripting Engine Memory Corruption Vulnerability
Scripting Engine Memory Corruption Vulnerability
- Record
CVE-2021-34448- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C - Weakness
- CWE-787
- Updated
- 2026-11-02
EUVDEUVD-2021-21103
Scripting Engine Memory Corruption Vulnerability
- Record
EUVD-2021-21103- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-6545-45rg-p2vp
Scripting Engine Memory Corruption Vulnerability
Scripting Engine Memory Corruption Vulnerability
- Record
GHSA-6545-45rg-p2vp- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-787
- Updated
- 2026-11-02
CISA KEV No score
Microsoft Windows Scripting Engine Memory Corruption Vulnerability
Microsoft Windows Scripting Engine contains an unspecified vulnerability that allows for memory corruption.
- Record
CVE-2021-34448- Weakness
- CWE-787
- Updated
- 2026-11-02
NVD
Scripting Engine Memory Corruption Vulnerability
- Record
CVE-2021-34448- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 9.3 High
AV:N/AC:M/Au:N/C:C/I:C/A:C - Weakness
- CWE-787
- Updated
- 2026-11-02
Affected products
- microsoft windows
- microsoft windows 10 version 1507
- microsoft windows 10 version 1607
- microsoft windows 10 version 1809
- microsoft windows 10 version 1909
- microsoft windows 10 version 2004
- microsoft windows 10 version 20h2
- microsoft windows 10 version 21h1
- microsoft windows 7
- microsoft windows 7 service pack 1
- microsoft windows 8.1
- microsoft windows server 2008 r2 service pack 1
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- microsoft windows server 2012
- microsoft windows server 2012 r2
- microsoft windows server 2016
- microsoft windows server 2019
- microsoft windows 10 1507
- microsoft windows 10 1607
- microsoft windows 10 1809
- microsoft windows 10 1909
- microsoft windows 10 2004
- microsoft windows 10 20h2
- microsoft windows 10 21h1
- microsoft windows rt 8.1
- microsoft windows server 2008
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-34448 is a medium vulnerability (CVSS 6.8) in Microsoft Windows, published July 16, 2021. CISA lists it as known to be exploited, since November 3, 2021. EUVD reports exploitation since November 3, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 40.1%, the 98th percentile. No source names a fixed version.