CVE-2018-8587
CVE-2018-8587 is a high-severity vulnerability in Microsoft Office with a CVSS 3.x base score of 7.8. Its EPSS exploit-prediction score of 29% places it in the 98th percentile, indicating an elevated likelihood of exploitation.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v2: 9.3
- EPSS exploit prediction: 29% (98th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Microsoft Office
- Published:
- Last modified:
Description
A remote code execution vulnerability exists in Microsoft Outlook software when it fails to properly handle objects in memory, aka "Microsoft Outlook Remote Code Execution Vulnerability." This affects Office 365 ProPlus, Microsoft Office, Microsoft Outlook.
Frequently asked questions
- What is CVE-2018-8587?
- A remote code execution vulnerability exists in Microsoft Outlook software when it fails to properly handle objects in memory, aka "Microsoft Outlook Remote Code Execution Vulnerability." This affects Office 365 ProPlus, Microsoft Office, Microsoft Outlook.
- How severe is CVE-2018-8587?
- CVE-2018-8587 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2018-8587 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 29% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-8587?
- CVE-2018-8587 primarily affects Microsoft Office. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2018-8587?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2018-8587 published?
- CVE-2018-8587 was published on 2018-12-12 and last updated on 2026-06-17.
References
- http://www.securityfocus.com/bid/106097
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8587
Affected products (6)
- cpe:2.3:a:microsoft:office:2010:sp2:*:*:*:*:*:*
- cpe:2.3:a:microsoft:office:2013:sp1:*:*:*:*:*:*
- cpe:2.3:a:microsoft:office:2013:sp1:*:*:rt:*:*:*
- cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:office_365_proplus:-:*:*:*:*:*:*:*
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