CVE-2018-0798

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 95%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pct · epss highExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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".

CVSS v3
8.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
95%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

January 10, 2018

Last Modified

October 28, 2025

Advisory Details (4)

Auto-updated Jun 2, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0798
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0798
generic
http://www.securitytracker.com/id/1040153
generic
http://www.securityfocus.com/bid/102370

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 79× in last 7d / 345× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 1,109 total refreshes for this CVE.

  1. 2026-09-08 08:37 UTCGHSA enrichment
  2. 2026-09-08 04:10 UTCVendor advisory
  3. 2026-09-08 04:10 UTCGHSA enrichment
  4. 2026-09-07 23:46 UTCVendor advisory
  5. 2026-09-07 23:46 UTCGHSA enrichment
  6. 2026-09-07 19:23 UTCVendor advisory
  7. 2026-09-07 19:23 UTCGHSA enrichment
  8. 2026-09-07 14:59 UTCGHSA enrichment
  9. 2026-09-07 10:35 UTCVendor advisory
  10. 2026-09-07 10:35 UTCGHSA enrichment
  11. 2026-09-07 06:10 UTCVendor advisory
  12. 2026-09-07 06:09 UTCGHSA enrichment
  13. 2026-09-07 01:46 UTCVendor advisory
  14. 2026-09-07 01:45 UTCGHSA enrichment
  15. 2026-09-06 21:17 UTCVendor advisory
  16. 2026-09-06 21:17 UTCGHSA enrichment
  17. 2026-09-06 16:53 UTCEG score recompute
  18. 2026-09-06 16:53 UTCVendor advisory
  19. 2026-09-06 16:53 UTCGHSA enrichment
  20. 2026-09-06 12:29 UTCVendor advisory
  21. 2026-09-06 12:29 UTCGHSA enrichment
  22. 2026-09-06 08:06 UTCVendor advisory
  23. 2026-09-06 08:06 UTCGHSA enrichment
  24. 2026-09-06 03:41 UTCVendor advisory
  25. 2026-09-06 03:41 UTCGHSA enrichment
Show 75 more
  1. 2026-09-05 23:18 UTCVendor advisory
  2. 2026-09-05 23:18 UTCGHSA enrichment
  3. 2026-09-05 18:54 UTCEG score recompute
  4. 2026-09-05 18:54 UTCVendor advisory
  5. 2026-09-05 18:54 UTCGHSA enrichment
  6. 2026-09-05 15:24 UTCEPSS rescore
  7. 2026-09-05 14:31 UTCVendor advisory
  8. 2026-09-05 14:31 UTCGHSA enrichment
  9. 2026-09-05 10:08 UTCVendor advisory
  10. 2026-09-05 10:08 UTCGHSA enrichment
  11. 2026-09-05 05:44 UTCVendor advisory
  12. 2026-09-05 05:44 UTCGHSA enrichment
  13. 2026-09-05 01:20 UTCVendor advisory
  14. 2026-09-05 01:20 UTCGHSA enrichment
  15. 2026-09-04 20:53 UTCVendor advisory
  16. 2026-09-04 20:53 UTCGHSA enrichment
  17. 2026-09-04 17:38 UTCCISA KEV update
  18. 2026-09-04 16:28 UTCVendor advisory
  19. 2026-09-04 16:28 UTCGHSA enrichment
  20. 2026-09-04 12:05 UTCVendor advisory
  21. 2026-09-04 12:05 UTCGHSA enrichment
  22. 2026-09-04 07:41 UTCVendor advisory
  23. 2026-09-04 07:41 UTCGHSA enrichment
  24. 2026-09-04 03:13 UTCVendor advisory
  25. 2026-09-04 03:13 UTCGHSA enrichment
  26. 2026-09-03 22:49 UTCVendor advisory
  27. 2026-09-03 22:49 UTCGHSA enrichment
  28. 2026-09-03 18:25 UTCVendor advisory
  29. 2026-09-03 18:25 UTCGHSA enrichment
  30. 2026-09-03 13:59 UTCVendor advisory
  31. 2026-09-03 13:59 UTCGHSA enrichment
  32. 2026-09-03 09:34 UTCVendor advisory
  33. 2026-09-03 09:34 UTCGHSA enrichment
  34. 2026-09-03 05:11 UTCVendor advisory
  35. 2026-09-03 05:11 UTCGHSA enrichment
  36. 2026-09-03 00:45 UTCVendor advisory
  37. 2026-09-03 00:45 UTCGHSA enrichment
  38. 2026-09-02 20:21 UTCVendor advisory
  39. 2026-09-02 20:21 UTCGHSA enrichment
  40. 2026-09-02 17:33 UTCCISA KEV update
  41. 2026-09-02 15:54 UTCVendor advisory
  42. 2026-09-02 15:54 UTCGHSA enrichment
  43. 2026-09-02 11:30 UTCVendor advisory
  44. 2026-09-02 11:30 UTCGHSA enrichment
  45. 2026-09-02 07:03 UTCVendor advisory
  46. 2026-09-02 07:03 UTCGHSA enrichment
  47. 2026-09-02 02:36 UTCVendor advisory
  48. 2026-09-02 02:36 UTCGHSA enrichment
  49. 2026-09-01 22:12 UTCVendor advisory
  50. 2026-09-01 22:12 UTCGHSA enrichment
  51. 2026-09-01 17:49 UTCVendor advisory
  52. 2026-09-01 17:49 UTCGHSA enrichment
  53. 2026-09-01 13:21 UTCVendor advisory
  54. 2026-09-01 13:21 UTCGHSA enrichment
  55. 2026-09-01 08:57 UTCVendor advisory
  56. 2026-09-01 08:57 UTCGHSA enrichment
  57. 2026-09-01 04:32 UTCEG score recompute
  58. 2026-09-01 04:32 UTCVendor advisory
  59. 2026-09-01 04:32 UTCGHSA enrichment
  60. 2026-09-01 04:29 UTCGHSA enrichment
  61. 2026-09-01 03:31 UTCEPSS rescore
  62. 2026-09-01 00:05 UTCVendor advisory
  63. 2026-09-01 00:04 UTCGHSA enrichment
  64. 2026-08-31 19:39 UTCVendor advisory
  65. 2026-08-31 19:39 UTCGHSA enrichment
  66. 2026-08-31 15:16 UTCVendor advisory
  67. 2026-08-31 15:15 UTCGHSA enrichment
  68. 2026-08-31 14:19 UTCCISA KEV update
  69. 2026-08-31 10:52 UTCVendor advisory
  70. 2026-08-31 10:51 UTCGHSA enrichment
  71. 2026-08-31 06:28 UTCVendor advisory
  72. 2026-08-31 06:28 UTCGHSA enrichment
  73. 2026-08-31 02:04 UTCVendor advisory
  74. 2026-08-31 02:04 UTCGHSA enrichment
  75. 2026-08-30 21:40 UTCEG score recompute

Frequently asked(6)

What is CVE-2018-0798?
CVE-2018-0798 is a critical vulnerability published on January 10, 2018. 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".
When was CVE-2018-0798 disclosed?
CVE-2018-0798 was first published in the National Vulnerability Database on January 10, 2018, with the most recent update on October 28, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-0798 actively exploited?
Yes. CISA added CVE-2018-0798 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Microsoft Office. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2018-0798?
CVE-2018-0798 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2018-0798?
CVE-2018-0798 affects Microsoft Office. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2018-0798?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-0798, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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