CVE-2026-45456

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. a secondary CVSS source baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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
28%
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-2026-45456

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 20× in last 7d / 98× 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 194 total refreshes for this CVE.

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

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 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-2026-45456 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 71.6% of all scored CVEs.
What is the CVSS score of CVE-2026-45456?
CVE-2026-45456 has a CVSS v3 base score of 8.4 (NVD).
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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