CVE-2021-31196
Detail
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
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:
CNA: Microsoft Corporation
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 Severity and Vector Strings:
Vector:
(AV:N/AC:L/Au:S/C:P/I:P/A:P)
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This CVE is in CISA's Known Exploited Vulnerabilities Catalog
Reference
CISA's BOD 22-01 and Known
Exploited Vulnerabilities Catalog for further guidance and requirements.
Vulnerability Name
Date Added
Due Date
Required Action
Microsoft Exchange Server Information Disclosure Vulnerability
08/21/2024
09/11/2024
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Weakness Enumeration
CWE-ID
CWE Name
Source
NVD-CWE-noinfo
Insufficient Information
NIST
Change History
15 change records found show changes
Modified Analysis by NIST
8/10/2026 3:58:38 PM
Action
Type
Old Value
New Value
Added
Reference Type
Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31196 Types: Patch, Vendor Advisory
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-2021-31196
Removed
Reference
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31196
Removed
Reference Type
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31196 Types: Patch, Vendor Advisory
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 CISA-ADP
6/16/2026 11:51:25 PM
Action
Type
Old Value
New Value
Added
SSVC
{"timestamp":"2025-01-28T16:51:30.730018Z","id":"CVE-2021-31196","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}
CVE Modified by Microsoft Corporation
6/16/2026 11:51:25 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"}]}]
Modified Analysis by NIST
10/29/2025 12:47:30 PM
Action
Type
Old Value
New Value
Added
Reference Type
CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31196 Types: US Government Resource
CVE Modified by CISA-ADP
10/21/2025 8:17:35 PM
Action
Type
Old Value
New Value
Added
Reference
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31196
CVE Modified by CISA-ADP
10/21/2025 4:18:34 PM
Action
Type
Old Value
New Value
Removed
Reference
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31196
CVE Modified by CISA-ADP
10/21/2025 3:19:05 PM
Action
Type
Old Value
New Value
Added
Reference
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31196
Modified Analysis by NIST
3/07/2025 3:16:21 PM
Action
Type
Old Value
New Value
CVE Modified by CVE
11/21/2024 1:05:17 AM
Action
Type
Old Value
New Value
Added
Reference
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31196
Modified Analysis by NIST
8/22/2024 10:13:46 AM
Action
Type
Old Value
New Value
CVE CISA KEV Update by Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government
8/21/2024 9:00:01 PM
Action
Type
Old Value
New Value
Added
Date Added
2024-08-21
Added
Due Date
2024-09-11
Added
Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Added
Vulnerability Name
Microsoft Exchange Server Information Disclosure Vulnerability
CVE Modified by Microsoft Corporation
5/14/2024 4:59:07 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-2021-31206, CVE-2021-34473.
Microsoft Exchange Server Remote Code Execution Vulnerability
Added
CVSS V3.1
Microsoft Corporation AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Initial Analysis by NIST
7/16/2021 11:31:22 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
NIST AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Added
CVSS V2
NIST (AV:N/AC:L/Au:S/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-2021-31196 No Types Assigned
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31196 Patch, Vendor Advisory
Quick Info
CVE Dictionary Entry: CVE-2021-31196 NVD
Published Date: 07/14/2021 NVD
Last Modified: 08/10/2026
Source: Microsoft Corporation
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