CVE-2026-70327

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-08-11. the CNA's CVSS baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.5Exploit: None knownExposed: 0

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

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

CVSS v3
6.5
EG Score
6.5(high)
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
Severity65% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
55%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 20, 2026

Advisory Details (1)

Auto-updated Aug 11, 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-2026-70327

Vendor Advisories for CVE-2026-70327(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 74× 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 115 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-70327?
CVE-2026-70327 is a medium vulnerability published on August 11, 2026. Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
When was CVE-2026-70327 disclosed?
CVE-2026-70327 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70327 actively exploited?
CVE-2026-70327 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 44.5% of all scored CVEs.
What is the CVSS score of CVE-2026-70327?
CVE-2026-70327 has a CVSS v4.0 base score of 6.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-70327?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70327, 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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