CVE-2026-66310

HIGHNVD 7.17.7▲
EchelonGraph scoreMEDIUM confidence

Score 7.7 from GitHub Security Advisory (severity: HIGH) published 2026-08-04. NVD baseline CVSS 7.1; sources differ by 0.6.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

External control of file name or path in Microsoft Edge for Android allows an unauthorized attacker to disclose information locally.

CVSS v3
7.1
EG Score
7.7HIGHmedium confidence
EG Risk
35
EG Risk 35/100CISA 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
Severity77% × 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
27th
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 3, 2026

Last Modified

September 25, 2026

Advisory Details (1)

Auto-updated Aug 3, 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-2026-66310

Vendor Advisories for CVE-2026-66310(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 25× in last 7d / 130× 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 345 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66310?
CVE-2026-66310 is a high vulnerability published on August 3, 2026. External control of file name or path in Microsoft Edge for Android allows an unauthorized attacker to disclose information locally.
When was CVE-2026-66310 disclosed?
CVE-2026-66310 was first published on August 3, 2026, with the most recent update on September 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66310 actively exploited?
CVE-2026-66310 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-66310?
CVE-2026-66310 has a CVSS v3 base score of 7.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.7 (HIGH).
How do I remediate CVE-2026-66310?
A fix for CVE-2026-66310 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-66310 are linked in the Vendor Advisories panel on this page.

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