A remote code execution vulnerability exists in the way that Microsoft Outlook parses…
Priority MEDIUM 56Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
A remote code execution vulnerability exists in the way that Microsoft Outlook parses specially modified rule export files, aka "Microsoft Outlook Remote Code Execution Vulnerability." This affects Office 365 ProPlus, Microsoft Office, Microsoft Outlook. This CVE ID is unique from CVE-2018-8522, CVE-2018-8524, CVE-2018-8576.
Why it matters now
EPSS 0.18594 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 Office | 2019 for 32-bit editions; 2019 for 64-bit editions | — | No fix listed | CNA |
| Microsoft | Office | 365 ProPlus for 32-bit Systems; 365 ProPlus for 64-bit Systems | — | No fix listed | CNA |
| Microsoft | Microsoft Outlook | 2010 Service Pack 2 (32-bit editions); 2010 Service Pack 2 (64-bit editions); 2013 RT Service Pack 1; 2013 Service Pack 1 (32-bit editions); 2013 Service Pack 1 (64-bit editions); 2016 (32-bit edition); 2016 (64-bit edition) | — | No fix listed | CNA |
- Microsoft Office VendorMicrosoft Affected 2019 for 32-bit editions; 2019 for 64-bit editions Fixed in — No fix listed CNA
- Office VendorMicrosoft Affected 365 ProPlus for 32-bit Systems; 365 ProPlus for 64-bit Systems Fixed in — No fix listed CNA
- Microsoft Outlook VendorMicrosoft Affected 2010 Service Pack 2 (32-bit editions); 2010 Service Pack 2 (64-bit editions); 2013 RT Service Pack 1; 2013 Service Pack 1 (32-bit editions); 2013 Service Pack 1 (64-bit editions); 2016 (32-bit edition); 2016 (64-bit edition) Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:office_365_proplus:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook:2010:sp2:*:*:*:*:*:* | 2010 sp2 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:*:*:*:* | 2013 sp1 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:* | 2016 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook_rt:2013:sp1:*:*:*:*:*:* | 2013 sp1 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:office_365_proplus:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook:2010:sp2:*:*:*:*:*:* Versions 2010 sp2 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:*:*:*:* Versions 2013 sp1 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:* Versions 2016 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook_rt:2013:sp1:*:*:*:*:*:* Versions 2013 sp1 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-8582
- 2026-10-03 Alias added: GHSA-3p5h-mwh8-3wx4
More Microsoft Office 365 Proplus vulnerabilities
- TI-2019-01013 A remote code execution vulnerability exists in Microsoft Excel software when the… KEVCVSS 3.1HIGH 8.8
- TI-2019-00335 Command injection in Microsoft Office KEVCVSS 3.1HIGH 8.8
- TI-2019-00377 A remote code execution vulnerability exists in Microsoft Word software when it fails to… CVSS 3.0HIGH 8.8
- TI-2019-01151 A remote code execution vulnerability exists in Microsoft Excel software when the… CVSS 3.1HIGH 7.8
- TI-2019-01045 A remote code execution vulnerability exists in Microsoft Excel software when the… CVSS 3.1HIGH 8.8
- TI-2018-06240 A remote code execution vulnerability exists in Microsoft Outlook software when it fails… CVSS 3.0HIGH 7.8
Sources
- CVE-2018-8582 · CVE Program
- CVE-2018-8582 · NVD
- FIRST EPSS
- GHSA-3p5h-mwh8-3wx4 · GitHub Advisory Database · CC BY 4.0
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