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CVE-2018-0802

Microsoft · Office · Microsoft Office Memory Corruption Vulnerability

· Added to CISA KEV
CVSS—
Severityhigh
Weakness—
ExploitedYes, in CISA KEV
Ransomware useKnown
Federal fix dueMay 3, 2022

Description

Microsoft Office contains a memory corruption vulnerability due to the way objects are handled in memory. Successful exploitation allows for remote code execution in the context of the current user. This vulnerability is known to be chained with CVE-2018-0798.

Required action (CISA)

Apply updates per vendor instructions.

References

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Our coverage of CVE-2018-0802

CVE-2008-4128high

July 2026 CVE Landscape

In July 2026, a significant increase in high-impact vulnerabilities was observed, with 85 critical flaws identified, 36 of which had a Very Critical Recorded Future Risk Score. A notable portion of these vulnerabilities were either already listed in CISA's Known Exploited Vulnerabilities catalog or were reported by vendors. The vulnerabilities affected a wide range of products from 61 vendors, with Microsoft products being the most frequently impacted.