CVE-2026-45461

HIGHPre-NVD 8.48.4—
EchelonGraph scoreHIGH 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
8.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.4Exploit: NoneExposed: 0

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

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

CVSS v3
8.4
EG Score
8.4(high)
EPSS
28.4%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 1, 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-2026-45461

Vendor Advisories for CVE-2026-45461(2)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 39× in last 7d / 180× 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 180 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-45461?
CVE-2026-45461 is a high vulnerability published on June 9, 2026. Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
When was CVE-2026-45461 disclosed?
CVE-2026-45461 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45461 actively exploited?
CVE-2026-45461 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 28.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45461?
CVE-2026-45461 has a CVSS v4.0 base score of 8.4 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-45461?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45461, 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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