CVE-2026-70339

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-08-11. The CNA's CVSS baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA SSVC

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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
33rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 11, 2026

Last Modified

September 29, 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-2026-70339

Vendor Advisories for CVE-2026-70339(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 18× in last 7d / 106× 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 290 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-70339?
CVE-2026-70339 is a medium vulnerability published on August 11, 2026. Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
When was CVE-2026-70339 disclosed?
CVE-2026-70339 was first published on August 11, 2026, with the most recent update on September 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70339 actively exploited?
CVE-2026-70339 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (33rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70339?
CVE-2026-70339 has a CVSS base score of 5.4 (the CNA's own assessment, by microsoft; NVD's own analysis pending).
How do I remediate CVE-2026-70339?
A fix for CVE-2026-70339 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70339 are linked in the Vendor Advisories panel on this page.

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