CVE-2021-28478 json
Microsoft SharePoint Server Spoofing Vulnerability
published 2021-05-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-15156
- cvss
- 7.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 75%
- public exploits
- 0
- none known
Summary
Microsoft SharePoint Server Spoofing Vulnerability
Patch / fix
- Microsoft Microsoft SharePoint Enterprise Server 2016 16.0.5161.1000
- Microsoft Microsoft SharePoint Server 2019 16.0.10374.20000
- Microsoft Microsoft SharePoint Foundation 2013 Service Pack 1 15.0.5345.1000
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 20 mo ago
Exploit prediction
1.57% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.6 | 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 |
| CNA | 3.1 | 7.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N |
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N |
| NVD | 2.0 | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
Affected products
- Microsoft Microsoft SharePoint Enterprise Server 2016
- Microsoft Microsoft SharePoint Server 2019
- Microsoft Microsoft SharePoint Foundation 2013 Service Pack 1
Classification
- Weakness
-
- CWE-290 Authentication Bypass by Spoofing
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-28478
patch, vendor-advisory
Sources
- CVE List CVE-2021-28478
- NVD CVE-2021-28478
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