CVE-2021-42309: microsoft microsoft sharepoint enterprise server 2016 Code Injection
CVSS: 8.8v3.1HighModified
Published 15-12-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-42309 is a high (CVSS 8.8) Code Injection vulnerability in microsoft microsoft sharepoint enterprise server 2016. EPSS estimates a 2.93% chance of exploitation in the next 30 days, higher than 86.8% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (CVE.org)EPSS score
2.93%
0%100%
Low · +0.27 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 15-12-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Microsoft SharePoint Server Remote Code Execution Vulnerability
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 8.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Medium 6.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
2.93%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
+0.27 pp
From 2.66% on 20-09-2026
20-09-202620-10-2026
EPSS score2.93%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-94Improper Control of Generation of Code ('Code Injection')The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
- CWE-732Incorrect Permission Assignment for Critical ResourceThe product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.
Affected systems
Microsoft7 products
- microsoft sharepoint enterprise server 2016≥ 16.0.0, < 16.0.5254.1000
- microsoft sharepoint foundation 2013 service pack 1≥ 15.0.0, < 15.0.5407.1000
- microsoft sharepoint server 2019≥ 16.0.0, < 16.0.10381.20001
- microsoft sharepoint server subscription edition≥ 16.0.0, < 16.0.14326.20620
- sharepoint_enterprise_server2016
1 vendor · 7 products
References
2 links
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42309X Refsource MISCPatchVendor Advisory