Microsoft SharePoint 2010 SP2/2013 SP1/2016/2019 Update denial of service

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.4$0-$5k0.00

A vulnerability was found in Microsoft SharePoint 2010 SP2/2013 SP1/2016/2019 (Groupware Software). It has been classified as problematic. This affects an unknown code of the component Update Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. This is going to have an impact on availability. The summary by CVE is:

Microsoft SharePoint Denial of Service Update

The weakness was shared 04/13/2021 as confirmed security guidance (Website). The advisory is shared at portal.msrc.microsoft.com. This vulnerability is uniquely identified as CVE-2021-28450 since 03/15/2021. The exploitability is told to be easy. It is possible to initiate the attack remotely. A authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/16/2021). MITRE ATT&CK project uses the attack technique T1499 for this issue.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

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VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.4

VulDB Base Score: 5.0
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 5.0
Vendor Vector (Microsoft): 🔒

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔒
Status: Unproven

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat: 🔍
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Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒

Patch: portal.msrc.microsoft.com

Timelineinfoedit

03/15/2021 CVE assigned
04/13/2021 +29 days VulDB entry created
04/13/2021 +0 days Advisory disclosed
04/13/2021 +0 days Countermeasure disclosed
04/16/2021 +3 days VulDB last update

Sourcesinfoedit

Vendor: https://www.microsoft.com/

Advisory: portal.msrc.microsoft.com
Status: Confirmed

CVE: CVE-2021-28450 (🔒)

Entryinfoedit

Created: 04/13/2021 10:03 PM
Updated: 04/16/2021 05:24 PM
Changes: (2) source_cve_assigned source_cve_nvd_summary
Complete: 🔍

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