How severe is CVE-2018-8432?

CVE-2018-8432 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-2018-8432 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-8432?

CVE-2018-8432 primarily affects Microsoft Excel Viewer. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-8432?

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-2018-8432 published?

CVE-2018-8432 was published on 2018-10-10 and last updated on 2026-06-17.

CVE-2018-8432

CVE-2018-8432 is a high-severity vulnerability in Microsoft Excel Viewer with a CVSS 3.x base score of 7.8. Its EPSS exploit-prediction score of 20% 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: 20% (97th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Excel Viewer
Published: 2018-10-10
Last modified: 2026-06-17

Description

A remote code execution vulnerability exists in the way that Microsoft Graphics Components handle objects in memory, aka "Microsoft Graphics Components Remote Code Execution Vulnerability." This affects Windows 7, Microsoft Office, Microsoft Office Word Viewer, Office 365 ProPlus, Microsoft Excel Viewer, Microsoft PowerPoint Viewer, Windows Server 2019, Windows Server 2008 R2, Windows 10, Windows Server 2008.

Frequently asked questions

What is CVE-2018-8432?: A remote code execution vulnerability exists in the way that Microsoft Graphics Components handle objects in memory, aka "Microsoft Graphics Components Remote Code Execution Vulnerability." This affects Windows 7, Microsoft Office, Microsoft Office Word Viewer, Office 365 ProPlus, Microsoft Excel Viewer, Microsoft PowerPoint Viewer, Windows Server 2019, Windows Server 2008 R2, Windows 10, Windows Server 2008.
How severe is CVE-2018-8432?: CVE-2018-8432 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-2018-8432 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-8432?: CVE-2018-8432 primarily affects Microsoft Excel Viewer. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-8432?: 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-2018-8432 published?: CVE-2018-8432 was published on 2018-10-10 and last updated on 2026-06-17.

References

Affected products (12)

cpe:2.3:a:microsoft:excel_viewer:2007:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2016:*:mac_os:*:*:*:*:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_365_proplus:-:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_compatibility_pack:-:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:powerpoint_viewer:2007:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:word_viewer:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*

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