CVE-2026-44817

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 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
29.7%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jun 9, 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-2026-44817

Vendor Advisories for CVE-2026-44817(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 8× in last 7d / 101× 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 170 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-44817?
CVE-2026-44817 is a high vulnerability published on June 9, 2026. Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
When was CVE-2026-44817 disclosed?
CVE-2026-44817 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44817 actively exploited?
CVE-2026-44817 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-44817?
CVE-2026-44817 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-44817?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44817, 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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