CVE-2026-55024

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-14. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

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

Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

July 14, 2026

Last Modified

September 17, 2026

Advisory Details (1)

Auto-updated Jul 14, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

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

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55024

Vendor Advisories for CVE-2026-55024(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 102× 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 291 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-55024?
CVE-2026-55024 is a high vulnerability published on July 14, 2026. Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
When was CVE-2026-55024 disclosed?
CVE-2026-55024 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55024 actively exploited?
CVE-2026-55024 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 60.4% of all scored CVEs.
What is the CVSS score of CVE-2026-55024?
CVE-2026-55024 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-55024?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55024, 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.

Dependency Blast Radius

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