CVE-2021-31206
Detail
Modified After Enrichment This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Current Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Analysis
Description
Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-31196, CVE-2021-34473.
Metrics
CVSS Version 4.0
CVSS Version 3.x
CVSS Version 2.0
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Vector:
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA: Microsoft Corporation
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L
CVSS 2.0 Severity and Vector Strings:
Vector:
(AV:A/AC:M/Au:N/C:C/I:C/A:C)
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Weakness Enumeration
CWE-ID
CWE Name
Source
NVD-CWE-noinfo
Insufficient Information
NIST
Change History
8 change records found show changes
CVE Modified by Microsoft Corporation
8/10/2026 12:17:35 PM
Action
Type
Old Value
New Value
Added
Reference
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31206
Removed
Reference
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31206
Removed
Reference
https://www.zerodayinitiative.com/advisories/ZDI-21-826/
Removed
Reference Type
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31206 Types: Patch, Vendor Advisory
Removed
Reference Type
https://www.zerodayinitiative.com/advisories/ZDI-21-826/ Types: Third Party Advisory, VDB Entry
Changed
Affected
[{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 9","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_9:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"15.02.0858.015","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 20","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_20:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"15.01.2242.012","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2013 Cumulative Update 23","cpes":["cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.00.0","lessThan":"15.00.1497.023","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 21","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"15.01.2308.014","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 10","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"15.02.0922.013","versionType":"custom","status":"affected"}]}]
[{"vendor":"Microsoft","product":"Microsoft Exchange Server 2013 Cumulative Update 23","platforms":["x64-based Systems"],"versions":[{"version":"15.00.0","lessThan":"15.00.1497.023","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 20","platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"15.01.2242.012","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 21","platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"15.01.2308.014","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 10","platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"15.02.0922.013","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 9","platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"15.02.0858.015","versionType":"custom","status":"affected"}]}]
CVE Modified by Microsoft Corporation
6/16/2026 11:51:27 PM
Action
Type
Old Value
New Value
Added
Affected
[{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 9","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_9:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"15.02.0858.015","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 20","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_20:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"15.01.2242.012","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2013 Cumulative Update 23","cpes":["cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.00.0","lessThan":"15.00.1497.023","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 21","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"15.01.2308.014","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 10","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"15.02.0922.013","versionType":"custom","status":"affected"}]}]
CVE Modified by CVE
11/21/2024 1:05:18 AM
Action
Type
Old Value
New Value
Added
Reference
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31206
Added
Reference
https://www.zerodayinitiative.com/advisories/ZDI-21-826/
CVE Modified by Microsoft Corporation
5/14/2024 4:59:10 AM
Action
Type
Old Value
New Value
CVE Modified by Microsoft Corporation
12/28/2023 6:15:13 PM
Action
Type
Old Value
New Value
Changed
Description
Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-31196, CVE-2021-34473.
Microsoft Exchange Server Remote Code Execution Vulnerability
Added
CVSS V3.1
Microsoft Corporation AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L
Modified Analysis by NIST
9/20/2021 8:20:30 AM
Action
Type
Old Value
New Value
Added
CVSS V3.1
NIST AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Removed
CVSS V3.1
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added
CVSS V2
NIST (AV:A/AC:M/Au:N/C:C/I:C/A:C)
Removed
CVSS V2
NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Changed
Reference Type
https://www.zerodayinitiative.com/advisories/ZDI-21-826/ No Types Assigned
https://www.zerodayinitiative.com/advisories/ZDI-21-826/ Third Party Advisory, VDB Entry
Added
CVSS V2 Metadata
Victim must voluntarily interact with attack mechanism
CVE Modified by Microsoft Corporation
7/19/2021 6:15:07 AM
Action
Type
Old Value
New Value
Added
Reference
https://www.zerodayinitiative.com/advisories/ZDI-21-826/ [No Types Assigned]
Initial Analysis by NIST
7/16/2021 11:38:51 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added
CVSS V2
NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Added
CWE
NIST NVD-CWE-noinfo
Added
CPE Configuration
OR
*cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*
*cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_20:*:*:*:*:*:*
*cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*
*cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*
*cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_9:*:*:*:*:*:*
Changed
Reference Type
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31206 No Types Assigned
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31206 Patch, Vendor Advisory
Quick Info
CVE Dictionary Entry: CVE-2021-31206 NVD
Published Date: 07/14/2021 NVD
Last Modified: 08/10/2026
Source: Microsoft Corporation
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