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Vulnerabilities

Vulnerability · CVE-2018-0798

Microsoft Office Memory Corruption Vulnerability

Published Jan 9, 2018 · catalog updated Jun 16, 2026 · Microsoft Office

Patch now

CVE-2018-0798 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Microsoft Office against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
High8.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
95.12%
Remediation
Remediation guidance
Affected products
cpe microsoft/office · cpe microsoft/office compatibility pack · cpe microsoft/word · vendor Microsoft Office

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-2018-0802.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/office2007
  • cpe microsoft/office2010
  • cpe microsoft/office2013
  • cpe microsoft/office2016
  • cpe microsoft/office compatibility packversion unspecified
  • cpe microsoft/word2007
  • cpe microsoft/word2010
  • vendor Microsoft Officeversion unspecified

How to fix CVE-2018-0798

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2018-0798 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Microsoft Office against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with 2007, 2010, 2013, 2016. Apply updates per vendor instructions.

What should an analyst verify?

CWE-787: Out-of-bounds Write. EPSS 95.12%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 9, 2018 · Catalog

    Detected

    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-2018-0802.

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 3, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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-2018-0802.

Sources

  • CISA KEVConfirmed exploitationCVE-2018-0798

    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-2018-0802.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2018-0798

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2018-0798

    30-day exploitation probability 95.1%

    first.org
  • NIST NVDVulnerability recordCVE-2018-0798

    Equation Editor in Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allows a remote code execution vulnerability due to the way objects are handled in memory, aka "Microsoft Office Memory Corruption Vulnerability".

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2018-0798

    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-2018-0802.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.