Deserialization of untrusted data in Microsoft Exchange Server 2019
Priority MEDIUM 62CWE-502Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-502.
Summary
A remote code execution vulnerability exists in Microsoft Exchange through the deserialization of metadata via PowerShell, aka 'Microsoft Exchange Remote Code Execution Vulnerability'.
Why it matters now
EPSS 0.21676 97th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 2019 | Cumulative Update 2 | — | No fix listed | CNA |
| Microsoft | Microsoft Exchange Server 2016 | Cumulative Update 13 | — | No fix listed | CNA |
| Microsoft | Microsoft Exchange Server 2013 | Cumulative Update 23 | — | No fix listed | CNA |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 3 | all versions | — | No fix listed | CNA |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 14 | all versions | — | No fix listed | CNA |
- Microsoft Exchange Server 2019 VendorMicrosoft Affected Cumulative Update 2 Fixed in — No fix listed CNA
- Microsoft Exchange Server 2016 VendorMicrosoft Affected Cumulative Update 13 Fixed in — No fix listed CNA
- Microsoft Exchange Server 2013 VendorMicrosoft Affected Cumulative Update 23 Fixed in — No fix listed CNA
- Microsoft Exchange Server 2019 Cumulative Update 3 VendorMicrosoft Affected all versions Fixed in — No fix listed CNA
- Microsoft Exchange Server 2016 Cumulative Update 14 VendorMicrosoft Affected all versions Fixed in — No fix listed 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_13:*:*:*:*:*:* | 2016 cumulative_update_13 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_14:*:*:*:*:*:* | 2016 cumulative_update_14 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_2:*:*:*:*:*:* | 2019 cumulative_update_2 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_3:*:*:*:*:*:* | 2019 cumulative_update_3 | 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_13:*:*:*:*:*:* Versions 2016 cumulative_update_13 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_14:*:*:*:*:*:* Versions 2016 cumulative_update_14 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_2:*:*:*:*:*:* Versions 2019 cumulative_update_2 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_3:*:*:*:*:*:* Versions 2019 cumulative_update_3 Vulnerable ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-1373
- 2026-10-03 Alias added: GHSA-24mr-37ph-25xf
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-2019-1373 · CVE Program
- CVE-2019-1373 · NVD
- FIRST EPSS
- GHSA-24mr-37ph-25xf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences