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TI-2022-06223 Aliases CVE-2022-21855GHSA-m86g-hcfp-6vv3

Microsoft Exchange Server Remote Code Execution Vulnerability

Priority MEDIUM 41Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

Microsoft Exchange Server Remote Code Execution Vulnerability

Why it matters now

EPSS 0.00949 61st percentileScored 2026-11-07
Fix Fixed Microsoft: 1 update

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Exchange Server 2013 Cumulative Update 2315.00.0 to before 15.00.1497.02815.00.1497.028Patch availableCNA
MicrosoftMicrosoft Exchange Server 2016 Cumulative Update 2115.01.0 to before 15.01.2308.02115.01.2308.021Patch availableCNA
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 1015.02.0 to before 15.02.0922.02015.02.0922.020Patch availableCNA
MicrosoftMicrosoft Exchange Server 2016 Cumulative Update 2215.0.0 to before 15.01.2375.01815.01.2375.018Patch availableCNA
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 1115.02.0 to before 15.02.0986.01515.02.0986.015Patch availableCNA
  • Microsoft Exchange Server 2013 Cumulative Update 23 VendorMicrosoft Affected 15.00.0 to before 15.00.1497.028 Fixed in 15.00.1497.028 Patch available CNA
  • Microsoft Exchange Server 2016 Cumulative Update 21 VendorMicrosoft Affected 15.01.0 to before 15.01.2308.021 Fixed in 15.01.2308.021 Patch available CNA
  • Microsoft Exchange Server 2019 Cumulative Update 10 VendorMicrosoft Affected 15.02.0 to before 15.02.0922.020 Fixed in 15.02.0922.020 Patch available CNA
  • Microsoft Exchange Server 2016 Cumulative Update 22 VendorMicrosoft Affected 15.0.0 to before 15.01.2375.018 Fixed in 15.01.2375.018 Patch available CNA
  • Microsoft Exchange Server 2019 Cumulative Update 11 VendorMicrosoft Affected 15.02.0 to before 15.02.0986.015 Fixed in 15.02.0986.015 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*2013 cumulative_update_23VulnerableMicrosoft
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*2016 cumulative_update_21VulnerableMicrosoft
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*2016 cumulative_update_22VulnerableMicrosoft
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*2019 cumulative_update_10VulnerableMicrosoft
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:*2019 cumulative_update_11VulnerableMicrosoft
  • cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:* Versions 2013 cumulative_update_23 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:* Versions 2016 cumulative_update_21 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:* Versions 2016 cumulative_update_22 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:* Versions 2019 cumulative_update_10 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:* Versions 2019 cumulative_update_11 Vulnerable ·Microsoft

Remediation

Microsoft 1 update

  • KB5008631
    Security Update
    • Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.028
    • Microsoft Exchange Server 2016 Cumulative Update 21 15.01.2308.021
    • Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.018
    • Microsoft Exchange Server 2019 Cumulative Update 10 15.02.0922.020
    • Microsoft Exchange Server 2019 Cumulative Update 11 15.02.0986.015

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Remote Code Execution
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation More Likely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-21855
  2. 2026-10-03 Alias added: GHSA-m86g-hcfp-6vv3

References

Advisory 1

  • TI-2024-14170 Microsoft Exchange Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-19610 Microsoft Exchange Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-13547 Microsoft Exchange Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-13502 Microsoft Exchange Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-08465 Microsoft Exchange Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-07929 Microsoft Exchange Server Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
See all 258 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences