CVE-2021-43242
Microsoft SharePoint Server Spoofing Vulnerability
Microsoft SharePoint Server Spoofing Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Microsoft SharePoint Server Spoofing Vulnerability
Microsoft SharePoint Server Spoofing Vulnerability
- Record
CVE-2021-43242- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-30186
Microsoft SharePoint Server Spoofing Vulnerability
- Record
EUVD-2021-30186- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7m2h-6799-f3jr
Microsoft SharePoint Server Spoofing Vulnerability This CVE ID is unique from CVE-2021-42320.
Microsoft SharePoint Server Spoofing Vulnerability This CVE ID is unique from CVE-2021-42320.
- Record
GHSA-7m2h-6799-f3jr- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
NVD
Microsoft SharePoint Server Spoofing Vulnerability
- Record
CVE-2021-43242- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N - CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N - CVSS 2.0
- 3.5 Low
AV:N/AC:M/Au:S/C:N/I:P/A:N - Updated
- 2026-11-02
Affected products
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-2021-43242 is a high vulnerability (CVSS 7.6) in Microsoft Sharepoint Server, published December 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.30%, the 70th percentile. No source names a fixed version.