Microsoft Exchange Server Spoofing Vulnerability
Priority HIGH 72Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.
Summary
Microsoft Exchange Server Spoofing Vulnerability
Why it matters now
EPSS 0.93497 99th 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 23 | 15.00.0 to before 15.00.1497.026 | 15.00.1497.026 | Patch available | CNA |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 21 | 15.01.0 to before 15.01.2308.020 | 15.01.2308.020 | Patch available | CNA |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 22 | 15.0.0 to before 15.01.2375.017 | 15.01.2375.017 | Patch available | CNA |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 10 | 15.02.0 to before 15.02.0792.019 | 15.02.0792.019 | Patch available | CNA |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 11 | 15.02.0 to before 15.02.0986.014 | 15.02.0986.014 | Patch available | CNA |
- Microsoft Exchange Server 2013 Cumulative Update 23 VendorMicrosoft Affected 15.00.0 to before 15.00.1497.026 Fixed in 15.00.1497.026 Patch available CNA
- Microsoft Exchange Server 2016 Cumulative Update 21 VendorMicrosoft Affected 15.01.0 to before 15.01.2308.020 Fixed in 15.01.2308.020 Patch available CNA
- Microsoft Exchange Server 2016 Cumulative Update 22 VendorMicrosoft Affected 15.0.0 to before 15.01.2375.017 Fixed in 15.01.2375.017 Patch available CNA
- Microsoft Exchange Server 2019 Cumulative Update 10 VendorMicrosoft Affected 15.02.0 to before 15.02.0792.019 Fixed in 15.02.0792.019 Patch available CNA
- Microsoft Exchange Server 2019 Cumulative Update 11 VendorMicrosoft Affected 15.02.0 to before 15.02.0986.014 Fixed in 15.02.0986.014 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:* | 2013 cumulative_update_23 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:* | 2016 cumulative_update_21 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:* | 2016 cumulative_update_22 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:* | 2019 cumulative_update_10 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:* | 2019 cumulative_update_11 | Vulnerable | Microsoft |
- 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
- Security Update
- Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.026
- Microsoft Exchange Server 2016 Cumulative Update 21 15.01.2308.020
- Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.017
- Microsoft Exchange Server 2019 Cumulative Update 10 15.02.0792.019
- Microsoft Exchange Server 2019 Cumulative Update 11 15.02.0986.014
Vendor assessments
Microsoft
Microsoft's page for this CVE →
- Impact
- Spoofing
- Exploited
- No
- Publicly disclosed
- No
- Exploitability
- Exploitation Less Likely
Timeline
- 2026-10-02 Threatist record created from CVE-2021-41349
- 2026-10-03 Alias added: GHSA-xjg9-924r-39mj
References
More Microsoft Exchange Server vulnerabilities
- 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
Sources
- CVE-2021-41349 · CVE Program
- CVE-2021-41349 · NVD
- FIRST EPSS
- GHSA-xjg9-924r-39mj · GitHub Advisory Database · CC BY 4.0
- CVE-2021-41349 · Microsoft Security Update Guide
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences