CVE-2018-0798
CVE-2018-0798 is a high-severity vulnerability in Microsoft Office with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-11-03). The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 9.3
- EPSS exploit prediction: 95% (100th percentile)
- Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
- EU (EUVD) id: EUVD-2018-1604
- EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
- Weakness: CWE-787
- Affected product: Microsoft Office
- Published:
- Last modified:
Description
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".
Frequently asked questions
- What is CVE-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".
- How severe is CVE-2018-0798?
- CVE-2018-0798 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2018-0798 being actively exploited?
- Yes. CVE-2018-0798 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
- What products are affected by CVE-2018-0798?
- CVE-2018-0798 primarily affects Microsoft Office. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2018-0798?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
- Does CVE-2018-0798 have an EU (EUVD) identifier?
- Yes. CVE-2018-0798 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-1604. It is also flagged as exploited in the EUVD (since 2021-11-03).
- When was CVE-2018-0798 published?
- CVE-2018-0798 was published on 2018-01-10 and last updated on 2026-06-17.
References
- http://www.securityfocus.com/bid/102370
- http://www.securitytracker.com/id/1040153
- https://0patch.blogspot.com/2018/01/bringing-abandoned-equation-editor-back.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0798
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0798
Affected products (11)
- cpe:2.3:a:microsoft:office:2007:sp3:*:*:*:*:*:*
- cpe:2.3:a:microsoft:office:2010:sp2:*:*:*:*:*:*
- cpe:2.3:a:microsoft:office:2013:sp1:*:*:*:*:*:*
- cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:office:2016:*:*:*:click-to-run:*:*:*
- cpe:2.3:a:microsoft:office_compatibility_pack:-:sp3:*:*:*:*:*:*
- cpe:2.3:a:microsoft:word:2007:sp3:*:*:*:*:*:*
- cpe:2.3:a:microsoft:word:2010:sp2:*:*:*:*:*:*
- cpe:2.3:a:microsoft:word:2013:sp1:*:*:*:*:*:*
- cpe:2.3:a:microsoft:word:2013:sp1:*:*:rt:*:*:*
- cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:*:*
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