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
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
30%
KEV
Not listed

Published

June 9, 2026

Last Modified

August 25, 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 28× in last 7d / 132× 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 315 total refreshes for this CVE.

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

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 August 25, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 70.0% of all scored CVEs.
What is the CVSS score of CVE-2026-44817?
CVE-2026-44817 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
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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