CVE-2021-31181
published 2021-05-11CVE-2021-31181: Microsoft SharePoint Remote Code Execution Vulnerability
PriorityP273high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EXPLOIT
EPSS
30.04%
98.0th percentile
Microsoft SharePoint Remote Code Execution Vulnerability
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_sharepoint_enterprise_server_2016 | >= 16.0.0 < 16.0.5161.1000 | 16.0.5161.1000 |
| microsoft | microsoft_sharepoint_foundation_2013_service_pack_1 | >= 15.0.0 < 15.0.5345.1000 | 15.0.5345.1000 |
| microsoft | microsoft_sharepoint_server_2019 | >= 16.0.0 < 16.0.10374.20000 | 16.0.10374.20000 |
| microsoft | sharepoint_enterprise_server | — | — |
| microsoft | sharepoint_foundation | — | — |
| microsoft | sharepoint_server | — | — |
| msrc | microsoft_sharepoint_enterprise_server_2016 | — | — |
| msrc | microsoft_sharepoint_foundation_2013_service_pack_1 | — | — |
| msrc | microsoft_sharepoint_server_2019 | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →Trend Micro Deep Security / Vulnerability Protection rule 1010947 detects exploitation attempts targeting CVE-2021-31181 (Microsoft SharePoint Server RCE). ↗
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.06.5MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P
vendor_msrc8.8HIGH
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Microsoft
Microsoft SharePoint Remote Code Execution Vulnerability
vendor_msrc·2021-05-11·CVSS 8.8
CVE-2021-31181 [HIGH] Microsoft SharePoint Remote Code Execution Vulnerability
Microsoft SharePoint Remote Code Execution Vulnerability
Microsoft Office SharePoint: Microsoft Office SharePoint
Microsoft: Microsoft
Impact: Remote Code Execution
Exploit Status: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation More Likely;Older Software Release:Exploitation More Likely;DOS:N/A
Reference: https://www.microsoft.com/download/details.aspx?familyid=650bb002-b472-4d9b-b36e-d960150b2ab7
Reference: https://www.microsoft.com/download/details.aspx?familyid=0036da36-a42a-47e3-855d-9485daf73539
Reference: https://www.microsoft.com/download/details.aspx?familyid=6830da9c-09be-44a0-a565-03638b030d89
GHSA
GHSA-jv6v-h246-28v4: Microsoft SharePoint Remote Code Execution Vulnerability
ghsa_unreviewed·2022-05-24
CVE-2021-31181 [HIGH] CWE-94 GHSA-jv6v-h246-28v4: Microsoft SharePoint Remote Code Execution Vulnerability
Microsoft SharePoint Remote Code Execution Vulnerability
No detection rules found.
Trendmicro
May Patch Tuesday Offers Relative Respite
blogs_trendmicro·2021-05-11·CVSS 9.8
[CRITICAL] May Patch Tuesday Offers Relative Respite
Ausnutzung von Schwachstellen
## May Patch Tuesday Offers Relative Respite
Compared to the previous months of 2021, this month’s Patch Tuesday cycle is a slight lull. Only 55 vulnerabilities were fixed this month, with only four of these classified as Critical.
By: Trend Micro May 11, 2021 Read time: ( words)
Save to Folio
Compared to the previous months of 2021, this month’s Patch Tuesday cycle is a slight lull. Only 55 vulnerabilities were fixed this month, with only four of these classified as Critical. One fell under the rarely used Moderate category, while the remaining 50 were classified as Important. A significant number of these vulnerabilities — 13 in total — were submitted via the Zero Day Initiative (ZDI).
Critical Vulnerabilities: HTTP Protocol Stack Vulnerability
The mo
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
Trendmicro
May Patch Tuesday Offers Relative Respite
blogs_trendmicro·2021-05-11·CVSS 9.8
[CRITICAL] May Patch Tuesday Offers Relative Respite
Exploits & Vulnerabilities
# May Patch Tuesday Offers Relative Respite
Compared to the previous months of 2021, this month’s Patch Tuesday cycle is a slight lull. Only 55 vulnerabilities were fixed this month, with only four of these classified as Critical.
By: Trend Micro
2021/05/11
Read time: ( words)
Save to Folio
Compared to the previous months of 2021, this month’s Patch Tuesday cycle is a slight lull. Only 55 vulnerabilities were fixed this month, with only four of these classified as Critical. One fell under the rarely used Moderate category, while the remaining 50 were classified as Important. A significant number of these vulnerabilities — 13 in total — were submitted via the Zero Day Initiative (ZDI).
Critical Vulnerabilities: HTTP Protocol Stack Vulnerability
The most se
Trendmicro
May Patch Tuesday Offers Relative Respite
blogs_trendmicro·2021-05-11·CVSS 9.8
[CRITICAL] May Patch Tuesday Offers Relative Respite
Sfruttamento vulnerabilità
## May Patch Tuesday Offers Relative Respite
Compared to the previous months of 2021, this month’s Patch Tuesday cycle is a slight lull. Only 55 vulnerabilities were fixed this month, with only four of these classified as Critical.
By: Trend Micro May 11, 2021 Read time: ( words)
Save to Folio
Compared to the previous months of 2021, this month’s Patch Tuesday cycle is a slight lull. Only 55 vulnerabilities were fixed this month, with only four of these classified as Critical. One fell under the rarely used Moderate category, while the remaining 50 were classified as Important. A significant number of these vulnerabilities — 13 in total — were submitted via the Zero Day Initiative (ZDI).
Critical Vulnerabilities: HTTP Protocol Stack Vulnerability
The most
Trendmicro
May Patch Tuesday Offers Relative Respite
blogs_trendmicro·2021-05-11·CVSS 9.8
[CRITICAL] May Patch Tuesday Offers Relative Respite
Exploits & Vulnerabilities
## May Patch Tuesday Offers Relative Respite
Compared to the previous months of 2021, this month’s Patch Tuesday cycle is a slight lull. Only 55 vulnerabilities were fixed this month, with only four of these classified as Critical.
By: Trend Micro May 11, 2021 Read time: ( words)
Save to Folio
Compared to the previous months of 2021, this month’s Patch Tuesday cycle is a slight lull. Only 55 vulnerabilities were fixed this month, with only four of these classified as Critical. One fell under the rarely used Moderate category, while the remaining 50 were classified as Important. A significant number of these vulnerabilities — 13 in total — were submitted via the Zero Day Initiative (ZDI).
Critical Vulnerabilities: HTTP Protocol Stack Vulnerability
The most
Trendmicro
May Patch Tuesday Offers Relative Respite
blogs_trendmicro·2021-05-11·CVSS 9.8
[CRITICAL] May Patch Tuesday Offers Relative Respite
Exploits & Vulnerabilities
## May Patch Tuesday Offers Relative Respite
Compared to the previous months of 2021, this month’s Patch Tuesday cycle is a slight lull. Only 55 vulnerabilities were fixed this month, with only four of these classified as Critical.
By: Trend Micro 2021/05/11 Read time: ( words)
Save to Folio
Compared to the previous months of 2021, this month’s Patch Tuesday cycle is a slight lull. Only 55 vulnerabilities were fixed this month, with only four of these classified as Critical. One fell under the rarely used Moderate category, while the remaining 50 were classified as Important. A significant number of these vulnerabilities — 13 in total — were submitted via the Zero Day Initiative (ZDI).
Critical Vulnerabilities: HTTP Protocol Stack Vulnerability
The most se
Qualys
Microsoft & Adobe Patch Tuesday (May 2021) - Qualys covers 85 Vulnerabilities, 26 Critical | Qualys
blogs_qualys·2021-05-11·CVSS 9.9
CVE-2021-31181 [CRITICAL] Microsoft & Adobe Patch Tuesday (May 2021) - Qualys covers 85 Vulnerabilities, 26 Critical | Qualys
### 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 Co
Trendmicro
May Patch Tuesday Offers Relative Respite
blogs_trendmicro·2021-05-11·CVSS 9.8
[CRITICAL] May Patch Tuesday Offers Relative Respite
Exploits y vulnerabilidades
## May Patch Tuesday Offers Relative Respite
Compared to the previous months of 2021, this month’s Patch Tuesday cycle is a slight lull. Only 55 vulnerabilities were fixed this month, with only four of these classified as Critical.
By: Trend Micro May 11, 2021 Read time: ( words)
Save to Folio
Compared to the previous months of 2021, this month’s Patch Tuesday cycle is a slight lull. Only 55 vulnerabilities were fixed this month, with only four of these classified as Critical. One fell under the rarely used Moderate category, while the remaining 50 were classified as Important. A significant number of these vulnerabilities — 13 in total — were submitted via the Zero Day Initiative (ZDI).
Critical Vulnerabilities: HTTP Protocol Stack Vulnerability
The most
Crowdstrike
May 2021 Patch Tuesday: Updates and Analysis
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CVE-2026-20929 [HIGH] May 2021 Patch Tuesday: Updates and Analysis
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Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
How CrowdStrike is Accelerating Exposure Evaluation as Adversaries Gain Speed Apr 06, 2026
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
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Helping Non-Security Stakeholders Understand AT
http://packetstormsecurity.com/files/163208/Microsoft-SharePoint-Unsafe-Control-And-ViewState-Remote-Code-Execution.htmlhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31181https://www.zerodayinitiative.com/advisories/ZDI-21-573/http://packetstormsecurity.com/files/163208/Microsoft-SharePoint-Unsafe-Control-And-ViewState-Remote-Code-Execution.htmlhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31181https://www.zerodayinitiative.com/advisories/ZDI-21-573/https://packetstorm.news/files/id/163208
2021-05-11
Published