CVE-2026-45456

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. the CNA's CVSS baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.4Exploit: 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 allows an unauthorized attacker to execute code locally.

CVSS v3
8.4
EG Score
8.4(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity84% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
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-2026-45456

Vendor Advisories for CVE-2026-45456(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 27× in last 7d / 137× 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 328 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 03:23 UTCGHSA enrichment
  7. 2026-08-24 15:39 UTCEG score recompute
  8. 2026-08-24 15:39 UTCVendor advisory
  9. 2026-08-24 15:39 UTCGHSA enrichment
  10. 2026-08-23 23:35 UTCVendor advisory
  11. 2026-08-23 23:35 UTCGHSA enrichment
  12. 2026-08-23 11:11 UTCEG score recompute
  13. 2026-08-23 11:11 UTCVendor advisory
  14. 2026-08-23 11:11 UTCGHSA enrichment
  15. 2026-08-23 00:19 UTCEPSS rescore
  16. 2026-08-21 23:49 UTCEPSS rescore
  17. 2026-08-21 19:46 UTCGHSA enrichment
  18. 2026-08-21 07:55 UTCEG score recompute
  19. 2026-08-21 07:55 UTCVendor advisory
  20. 2026-08-21 07:55 UTCGHSA enrichment
  21. 2026-08-20 22:55 UTCEPSS rescore
  22. 2026-08-20 20:51 UTCVendor advisory
  23. 2026-08-20 20:51 UTCGHSA enrichment
  24. 2026-08-20 09:01 UTCEG score recompute
  25. 2026-08-20 09:01 UTCVendor advisory
Show 75 more
  1. 2026-08-20 09:01 UTCGHSA enrichment
  2. 2026-08-19 17:04 UTCEPSS rescore
  3. 2026-08-18 13:48 UTCEPSS rescore
  4. 2026-08-17 13:47 UTCEPSS rescore
  5. 2026-08-17 11:52 UTCVendor advisory
  6. 2026-08-17 11:52 UTCGHSA enrichment
  7. 2026-08-17 00:38 UTCEG score recompute
  8. 2026-08-17 00:38 UTCVendor advisory
  9. 2026-08-17 00:38 UTCGHSA enrichment
  10. 2026-08-16 14:56 UTCEPSS rescore
  11. 2026-08-16 12:54 UTCEG score recompute
  12. 2026-08-16 12:54 UTCVendor advisory
  13. 2026-08-16 12:54 UTCGHSA enrichment
  14. 2026-08-16 02:14 UTCEPSS rescore
  15. 2026-08-16 01:47 UTCVendor advisory
  16. 2026-08-16 01:47 UTCGHSA enrichment
  17. 2026-08-15 14:43 UTCVendor advisory
  18. 2026-08-15 14:43 UTCGHSA enrichment
  19. 2026-08-15 03:39 UTCEG score recompute
  20. 2026-08-15 03:39 UTCVendor advisory
  21. 2026-08-15 03:39 UTCGHSA enrichment
  22. 2026-08-15 01:30 UTCEPSS rescore
  23. 2026-08-14 16:34 UTCVendor advisory
  24. 2026-08-14 16:34 UTCGHSA enrichment
  25. 2026-08-14 08:07 UTCEG score recompute
  26. 2026-08-14 08:07 UTCGHSA enrichment
  27. 2026-08-13 22:00 UTCEPSS rescore
  28. 2026-08-13 21:03 UTCVendor advisory
  29. 2026-08-13 21:03 UTCGHSA enrichment
  30. 2026-08-13 05:50 UTCVendor advisory
  31. 2026-08-13 05:50 UTCGHSA enrichment
  32. 2026-08-12 18:45 UTCEG score recompute
  33. 2026-08-12 18:45 UTCVendor advisory
  34. 2026-08-12 18:45 UTCGHSA enrichment
  35. 2026-08-12 13:51 UTCEPSS rescore
  36. 2026-08-12 07:41 UTCVendor advisory
  37. 2026-08-12 07:41 UTCGHSA enrichment
  38. 2026-08-11 20:16 UTCEG score recompute
  39. 2026-08-11 20:16 UTCVendor advisory
  40. 2026-08-11 20:16 UTCGHSA enrichment
  41. 2026-08-11 09:12 UTCEG score recompute
  42. 2026-08-11 09:12 UTCVendor advisory
  43. 2026-08-11 09:12 UTCGHSA enrichment
  44. 2026-08-11 00:00 UTCEPSS rescore
  45. 2026-08-10 22:08 UTCGHSA enrichment
  46. 2026-08-10 11:03 UTCGHSA enrichment
  47. 2026-08-09 23:57 UTCEG score recompute
  48. 2026-08-09 23:57 UTCGHSA enrichment
  49. 2026-08-09 13:46 UTCEPSS rescore
  50. 2026-08-09 12:54 UTCVendor advisory
  51. 2026-08-09 12:54 UTCGHSA enrichment
  52. 2026-08-09 01:49 UTCEG score recompute
  53. 2026-08-09 01:49 UTCVendor advisory
  54. 2026-08-09 01:49 UTCGHSA enrichment
  55. 2026-08-08 16:37 UTCEPSS rescore
  56. 2026-08-08 14:45 UTCVendor advisory
  57. 2026-08-08 14:45 UTCGHSA enrichment
  58. 2026-08-08 03:40 UTCGHSA enrichment
  59. 2026-08-07 16:36 UTCEG score recompute
  60. 2026-08-07 16:36 UTCGHSA enrichment
  61. 2026-08-07 05:32 UTCVendor advisory
  62. 2026-08-07 05:32 UTCGHSA enrichment
  63. 2026-08-06 18:20 UTCEG score recompute
  64. 2026-08-06 18:20 UTCVendor advisory
  65. 2026-08-06 18:20 UTCGHSA enrichment
  66. 2026-08-06 13:47 UTCEPSS rescore
  67. 2026-08-06 07:14 UTCVendor advisory
  68. 2026-08-06 07:14 UTCGHSA enrichment
  69. 2026-08-05 20:10 UTCEG score recompute
  70. 2026-08-05 20:10 UTCVendor advisory
  71. 2026-08-05 20:10 UTCGHSA enrichment
  72. 2026-08-05 19:17 UTCEPSS rescore
  73. 2026-08-04 16:09 UTCEG score recompute
  74. 2026-08-04 16:09 UTCVendor advisory
  75. 2026-08-04 16:09 UTCGHSA enrichment

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-45456?
CVE-2026-45456 is a high vulnerability published on June 9, 2026. Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
When was CVE-2026-45456 disclosed?
CVE-2026-45456 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-2026-45456 actively exploited?
CVE-2026-45456 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 63.6% of all scored CVEs.
What is the CVSS score of CVE-2026-45456?
CVE-2026-45456 has a CVSS v4.0 base score of 8.4 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-45456?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45456, 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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