Out-of-bounds write in Microsoft Exchange Server
Priority MEDIUM 64CWE-787Published · 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 3.0 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
A remote code execution vulnerability exists in Microsoft Exchange software when the software fails to properly handle objects in memory, aka "Microsoft Exchange Memory Corruption Vulnerability." This affects Microsoft Exchange Server.
Why it matters now
EPSS 0.2707 98th 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 | 2010 Service Pack 3 Update Rollup 23; 2013 Cumulative Update 20; 2013 Cumulative Update 21; 2016 Cumulative Update 10; 2016 Cumulative Update 9 | — | No fix listed | CNA |
- Microsoft Exchange Server VendorMicrosoft Affected 2010 Service Pack 3 Update Rollup 23; 2013 Cumulative Update 20; 2013 Cumulative Update 21; 2016 Cumulative Update 10; 2016 Cumulative Update 9 Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:exchange_server:2010:sp3:*:*:*:*:*:* | 2010 sp3 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_20:*:*:*:*:*:* | 2013 cumulative_update_20 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_21:*:*:*:*:*:* | 2013 cumulative_update_21 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_10:*:*:*:*:*:* | 2016 cumulative_update_10 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_9:*:*:*:*:*:* | 2016 cumulative_update_9 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:exchange_server:2010:sp3:*:*:*:*:*:* Versions 2010 sp3 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_20:*:*:*:*:*:* Versions 2013 cumulative_update_20 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_21:*:*:*:*:*:* Versions 2013 cumulative_update_21 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_10:*:*:*:*:*:* Versions 2016 cumulative_update_10 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_9:*:*:*:*:*:* Versions 2016 cumulative_update_9 Vulnerable ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-8302
- 2026-10-03 Alias added: GHSA-w7c5-hj78-g4cx
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-2018-8302 · CVE Program
- CVE-2018-8302 · NVD
- FIRST EPSS
- GHSA-w7c5-hj78-g4cx · 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