CVE-2026-50678

MEDIUMPre-NVD 6.66.6—
EchelonGraph scoreMEDIUM confidence

Score 6.6 from GitHub Security Advisory published 2026-07-14. the CNA's CVSS baseline 6.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
6.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.6Exploit: None knownExposed: 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 Excel allows an unauthorized attacker to disclose information locally.

CVSS v3
6.6
EG Score
6.6(medium)
EG Risk
30(Track)
EG Risk 30/100SSVC: 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
Severity66% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

July 14, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Jul 15, 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-2026-50678

Vendor Advisories for CVE-2026-50678(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 / 115× 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 171 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-50678?
CVE-2026-50678 is a medium vulnerability published on July 14, 2026. Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
When was CVE-2026-50678 disclosed?
CVE-2026-50678 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50678 actively exploited?
CVE-2026-50678 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 61.1% of all scored CVEs.
What is the CVSS score of CVE-2026-50678?
CVE-2026-50678 has a CVSS v4.0 base score of 6.6 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-50678?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50678, 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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