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%CVSS: 7.1Exploit: None knownExposed: 0

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

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
7.7(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity77% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

August 3, 2026

Last Modified

September 17, 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(1)

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.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 35× in last 7d / 156× 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 287 total refreshes for this CVE.

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

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 in the National Vulnerability Database on August 3, 2026, with the most recent update on September 17, 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% probability of exploitation in the next 30 days, which ranks it in the top 86.6% of all 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.
How do I remediate CVE-2026-66310?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66310, 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

Explore the affected products and dependency analysis for CVE-2026-66310

Explore →

Is Your Infrastructure Affected by CVE-2026-66310?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs