CVE-2021-31206
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
- Record
CVE-2021-31206- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L/E:F/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-18119
Microsoft Exchange Server Remote Code Execution Vulnerability
- Record
EUVD-2021-18119- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L/E:F/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-636v-jm8j-6hx7
Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021...
Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-31196, CVE-2021-34473.
- Record
GHSA-636v-jm8j-6hx7- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L - Updated
- 2026-11-02
NVD
Microsoft Exchange Server Remote Code Execution Vulnerability
- Record
CVE-2021-31206- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L - CVSS 3.1
- 8.0 High
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.9 High
AV:A/AC:M/Au:N/C:C/I:C/A:C - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-31206 is a high vulnerability (CVSS 7.6) in Microsoft Exchange Server, published July 14, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 13.0%, the 96th percentile. No source names a fixed version.