CVE-2021-31209
published 2021-05-11CVE-2021-31209: Microsoft Exchange Server Spoofing Vulnerability Microsoft Exchange Server Spoofing Vulnerability
high8.1CVSS 3.1
AVNACLPRNUIRSUCHIHAN
EPSS
2.63%
83.8th percentile
Microsoft Exchange Server Spoofing Vulnerability
Microsoft Exchange Server Spoofing Vulnerability
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_exchange_server_2013_cumulative_update_23 | >= 15.00.0 < 15.00.1497.018 | 15.00.1497.018 |
| microsoft | microsoft_exchange_server_2016_cumulative_update_19 | >= 15.01.0 < 15.01.2176.014 | 15.01.2176.014 |
| microsoft | microsoft_exchange_server_2016_cumulative_update_20 | >= 15.01.0 < 15.01.2242.010 | 15.01.2242.010 |
| microsoft | microsoft_exchange_server_2019_cumulative_update_8 | >= 15.02.0 < 15.02.0792.015 | 15.02.0792.015 |
| microsoft | microsoft_exchange_server_2019_cumulative_update_9 | >= 15.02.0 < 15.02.0858.012 | 15.02.0858.012 |
| msrc | microsoft_exchange_server_2013_cumulative_update_23 | — | — |
| msrc | microsoft_exchange_server_2016_cumulative_update_19 | — | — |
| msrc | microsoft_exchange_server_2016_cumulative_update_20 | — | — |
| msrc | microsoft_exchange_server_2019_cumulative_update_8 | — | — |
| msrc | microsoft_exchange_server_2019_cumulative_update_9 | — | — |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
nvdv2.05.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:N
cvelistv56.5MEDIUM
vendor_msrc6.5MEDIUM
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CVEList
Microsoft Exchange Server Spoofing Vulnerability
cvelistv5·2021-05-11·CVSS 6.5
CVE-2021-31209 [MEDIUM] Microsoft Exchange Server Spoofing Vulnerability
Microsoft Exchange Server Spoofing Vulnerability
Microsoft Exchange Server Spoofing Vulnerability
Microsoft
Microsoft Exchange Server Spoofing Vulnerability
vendor_msrc·2021-05-11·CVSS 6.5
CVE-2021-31209 [MEDIUM] Microsoft Exchange Server Spoofing Vulnerability
Microsoft Exchange Server Spoofing Vulnerability
FAQ: Was this vulnerability found in the 2021 Pwn2Own contest?
Yes, this was one of the Exchange Server vulnerabilities found in the 2021 Pwn2Own contest.
Microsoft Exchange Server: Microsoft Exchange Server
Microsoft: Microsoft
Impact: Spoofing
Exploit Status: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely;Older Software Release:Exploitation Less Likely;DOS:N/A
Reference: http://www.microsoft.com/download/details.aspx?familyid=9536f4a0-838b-40a6-b625-36cd7a6229a1
Reference: https://support.microsoft.com/help/5003435
Reference: http://www.microsoft.com/download/details.aspx?familyid=e8857a66-5eb5-4b0e-b938-07eb17c3af1a
Reference: http://www.microsoft.com/download/details.aspx?familyid=91b8d31b-dc
No detection rules found.
No public exploits indexed.
Tenable
Microsoft’s May 2021 Patch Tuesday Addresses 55 CVEs (CVE-2021-31166)
blogs_tenable·2021-05-11·CVSS 9.8
[CRITICAL] Microsoft’s May 2021 Patch Tuesday Addresses 55 CVEs (CVE-2021-31166)
## Cloud Exposure
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## Vulnerability Exposure
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## AI Exposure
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## OT/IoT Exposure
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## Identity Exposure
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## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Qualys
Microsoft & Adobe Patch Tuesday (May 2021) – Qualys covers 85 Vulnerabilities, 26 Critical
blogs_qualys·2021-05-11·CVSS 9.9
CVE-2021-31181 [CRITICAL] Microsoft & Adobe Patch Tuesday (May 2021) – Qualys covers 85 Vulnerabilities, 26 Critical
## Microsoft Patch Tuesday – May 2021
Microsoft patched 55 CVEs in their May 2021 Patch Tuesday release, of which 4 are rated as critical severity. Three 0-day vulnerability patches were included in the release. As of this publication date, none have been exploited.
Qualys released 12 QIDs on the same day, providing vulnerability detection and patch management coverage (where applicable) for all 55 CVEs and the related KBs.
## Critical Microsoft vulnerabilities patched:
CVE-2021-31181 – SharePoint Remote Code Execution Vulnerability
Microsoft released patches addressing a critical RCE vulnerability in SharePoint (CVE-2021-31181). This CVE has a high likelihood of exploitability and is assigned a CVSSv3 base score of 8.8 by the vendor.
CVE-2021-31166 – HTTP Protocol Stack Remote Code
2021-05-11
Published