CVE-2021-31959
Scripting Engine Memory Corruption Vulnerability
6.4 Medium
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
- Low
- Integrity
- High
- Availability
- Low
Exploit likelihood
9.23%Up 8.9 points since Jun 9, 2021
What each source reports
CVE List Score used
Scripting Engine Memory Corruption Vulnerability
Scripting Engine Memory Corruption Vulnerability
- Record
CVE-2021-31959- CVSS 3.1
- 6.4 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L/E:U/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-18831
Scripting Engine Memory Corruption Vulnerability
- Record
EUVD-2021-18831- CVSS 3.1
- 6.4 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L/E:U/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5mhj-whm9-8phq
Scripting Engine Memory Corruption Vulnerability
Scripting Engine Memory Corruption Vulnerability
- Record
GHSA-5mhj-whm9-8phq- CVSS 3.1
- 6.4 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L - Updated
- 2026-11-02
NVD
Scripting Engine Memory Corruption Vulnerability
- Record
CVE-2021-31959- CVSS 3.1
- 6.4 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L - CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
Affected products
- 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
- microsoft windows server 2012
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-31959 is a medium vulnerability (CVSS 6.4) in Microsoft Windows 10 Version 1507, published June 8, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 9.23%, the 95th percentile. No source names a fixed version.