How severe is CVE-2018-8628?

CVE-2018-8628 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-2018-8628 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-8628?

CVE-2018-8628 primarily affects Microsoft Office. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-8628?

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-2018-8628 published?

CVE-2018-8628 was published on 2018-12-12 and last updated on 2026-06-17.

CVE-2018-8628

CVE-2018-8628 is a high-severity vulnerability in Microsoft Office with a CVSS 3.x base score of 7.8. Its EPSS exploit-prediction score of 16% places it in the 97th 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: 16% (97th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Office
Published: 2018-12-12
Last modified: 2026-06-17

Description

A remote code execution vulnerability exists in Microsoft PowerPoint software when the software fails to properly handle objects in memory, aka "Microsoft PowerPoint Remote Code Execution Vulnerability." This affects Microsoft Office, Office 365 ProPlus, Microsoft PowerPoint, Microsoft SharePoint, Microsoft PowerPoint Viewer, Office Online Server, Microsoft SharePoint Server.

Frequently asked questions

What is CVE-2018-8628?: A remote code execution vulnerability exists in Microsoft PowerPoint software when the software fails to properly handle objects in memory, aka "Microsoft PowerPoint Remote Code Execution Vulnerability." This affects Microsoft Office, Office 365 ProPlus, Microsoft PowerPoint, Microsoft SharePoint, Microsoft PowerPoint Viewer, Office Online Server, Microsoft SharePoint Server.
How severe is CVE-2018-8628?: CVE-2018-8628 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-2018-8628 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-8628?: CVE-2018-8628 primarily affects Microsoft Office. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-8628?: 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-2018-8628 published?: CVE-2018-8628 was published on 2018-12-12 and last updated on 2026-06-17.

References

Affected products (15)

cpe:2.3:a:microsoft:office:2016:*:*:*:*:mac_os_x:*:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:office_365_proplus:-:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_compatibility_pack:-:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_web_apps:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_web_apps:2013:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:powerpoint:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:powerpoint:2013:sp1:*:*:rt:*:*:*
cpe:2.3:a:microsoft:powerpoint:2016:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:powerpoint_viewer:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_enterprise_server:2016:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2013:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*

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