CVE Tools
Sign in

CVE-2021-31196

Published: Jul 14, 2021Updated: Oct 29, 2025 Sources: CVE List NVD BDUNVD-CWE-noinfo
7.2HIGH
NVD MITRE
EPSS Score
46.4%
Top 1.3%
CISA KEV
Active Exploitation
Since Aug 21, 2024
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfo

Affected Products

Microsoft Corp
commercial·USaka microsoft, microsoft corporation
exchange serverOn-prem
Operating Systems / windows
Microsoft Exchange Server 2019 Cumulative Update 9On-premWeb App
Enterprise Software / itsm-monitoring
Microsoft Exchange Server 2016 Cumulative Update 20On-premWeb App
Enterprise Software / itsm-monitoring
Microsoft Exchange Server 2013 Cumulative Update 23On-prem
Enterprise Software / itsm-monitoring
Microsoft Exchange Server 2016 Cumulative Update 21On-premWeb App
Enterprise Software / itsm-monitoring
Microsoft Exchange Server 2019 Cumulative Update 10On-premWeb App
Enterprise Software / itsm-monitoring
Microsoft Exchange ServerOn-prem
Operating Systems

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Aug 21, 2024
Remediation due:Sep 11, 2024

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Official Patch Available
Is your org exposed to CVE-2021-31196?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31196
portal.msrc.microsoft.com
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31196
cisa.gov
https://www.cybersecurity-help.cz/vdb/SB2021071319
cybersecurity-help.cz
and 2 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-31196 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows