Microsoft Monthly Security Update (May 2021)
Last Update Date:
20 May 2021
Release Date:
12 May 2021
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RISK: High Risk
TYPE: Operating Systems - Windows OS
Microsoft has released monthly security update for their products:
| Vulnerable Product | Risk Level | Impacts | Notes |
| Windows |  High Risk | Spoofing Information Disclosure Remote Code Execution Elevation of Privilege Denial of Service Security Restriction Bypass | Proof Of Concept Exploit Code Is Publicly Available for CVE-2021-31166 |
| Extended Security Updates (ESU) |  Medium Risk | Spoofing Information Disclosure Remote Code Execution Elevation of Privilege | |
| Developer Tools | Medium Risk | Remote Code Execution Elevation of Privilege | |
| Microsoft Office | Medium Risk | Remote Code Execution Information Disclosure Spoofing | |
| Microsoft Dynamics |  Low Risk | Spoofing | |
| Browser | Medium Risk | Remote Code Execution | |
| Exchange Server | Medium Risk | Remote Code Execution Security Restriction Bypass Spoofing | |
| Open Source Software | Medium Risk | Remote Code Execution | |
| Azure | Medium Risk | Information Disclosure |
Number of 'Extremely High Risk' product(s): 0
Number of 'High Risk' product(s): 1
Number of 'Medium Risk' product(s): 7
Number of 'Low Risk' product(s): 1
Evaluation of overall 'Risk Level': High Risk
[Updated 20-May-2021] Proof Of Concept Exploit Code Is Publicly Available for CVE-2021-31166. Risk Level Has Been Escalated to High Risk.
Impact
- Denial of Service
- Elevation of Privilege
- Remote Code Execution
- Security Restriction Bypass
- Information Disclosure
- Spoofing
System / Technologies affected
- Windows
- Extended Security Updates (ESU)
- Developer Tools
- Microsoft Office
- Microsoft Dynamics
- Browser
- Exchange Server
- Open Source Software
- Azure
Solutions
Before installation of the software, please visit the vendor web-site for more details.
- Apply fixes issued by the vendor.
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