CVE-2026-78523

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.0%, top 39% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

Use after free in Windows DNS allows an unauthorized attacker to deny service over a network.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
61%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 24, 2026

Advisory Details (1)

Auto-updated Sep 8, 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-2026-78523

Vendor Advisories for CVE-2026-78523(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 51× in last 7d / 128× 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 128 total refreshes for this CVE.

  1. 2026-09-24 23:44 UTCVendor advisory
  2. 2026-09-24 23:44 UTCGHSA enrichment
  3. 2026-09-24 22:28 UTCVendor advisory
  4. 2026-09-24 22:28 UTCGHSA enrichment
  5. 2026-09-24 20:41 UTCVendor advisory
  6. 2026-09-24 20:41 UTCGHSA enrichment
  7. 2026-09-24 17:26 UTCEG score recompute
  8. 2026-09-24 17:26 UTCVendor advisory
  9. 2026-09-24 17:26 UTCGHSA enrichment
  10. 2026-09-24 14:04 UTCEPSS rescore
  11. 2026-09-24 09:57 UTCVendor advisory
  12. 2026-09-24 09:57 UTCGHSA enrichment
  13. 2026-09-23 22:43 UTCVendor advisory
  14. 2026-09-23 22:43 UTCGHSA enrichment
  15. 2026-09-23 18:53 UTCEG score recompute
  16. 2026-09-23 18:53 UTCVendor advisory
  17. 2026-09-23 18:53 UTCGHSA enrichment
  18. 2026-09-23 17:54 UTCEPSS rescore
  19. 2026-09-23 13:41 UTCVendor advisory
  20. 2026-09-23 13:41 UTCGHSA enrichment
  21. 2026-09-23 02:27 UTCEG score recompute
  22. 2026-09-23 02:27 UTCVendor advisory
  23. 2026-09-23 02:27 UTCGHSA enrichment
  24. 2026-09-22 16:01 UTCEPSS rescore
  25. 2026-09-22 15:13 UTCVendor advisory
Show 75 more
  1. 2026-09-22 15:13 UTCGHSA enrichment
  2. 2026-09-22 03:59 UTCEG score recompute
  3. 2026-09-22 03:59 UTCVendor advisory
  4. 2026-09-22 03:59 UTCGHSA enrichment
  5. 2026-09-21 21:09 UTCEPSS rescore
  6. 2026-09-21 16:46 UTCVendor advisory
  7. 2026-09-21 16:46 UTCGHSA enrichment
  8. 2026-09-21 05:34 UTCEG score recompute
  9. 2026-09-21 05:34 UTCVendor advisory
  10. 2026-09-21 05:34 UTCGHSA enrichment
  11. 2026-09-20 20:16 UTCEPSS rescore
  12. 2026-09-20 18:19 UTCVendor advisory
  13. 2026-09-20 18:19 UTCGHSA enrichment
  14. 2026-09-20 07:06 UTCVendor advisory
  15. 2026-09-20 07:06 UTCGHSA enrichment
  16. 2026-09-19 19:34 UTCEG score recompute
  17. 2026-09-19 19:34 UTCVendor advisory
  18. 2026-09-19 19:34 UTCGHSA enrichment
  19. 2026-09-19 08:20 UTCVendor advisory
  20. 2026-09-19 08:20 UTCGHSA enrichment
  21. 2026-09-18 21:07 UTCEG score recompute
  22. 2026-09-18 21:07 UTCVendor advisory
  23. 2026-09-18 21:07 UTCGHSA enrichment
  24. 2026-09-18 19:28 UTCEPSS rescore
  25. 2026-09-18 14:13 UTCVendor advisory
  26. 2026-09-18 14:13 UTCGHSA enrichment
  27. 2026-09-18 10:22 UTCVendor advisory
  28. 2026-09-18 10:22 UTCGHSA enrichment
  29. 2026-09-17 23:08 UTCVendor advisory
  30. 2026-09-17 23:08 UTCGHSA enrichment
  31. 2026-09-17 20:12 UTCVendor advisory
  32. 2026-09-17 20:12 UTCGHSA enrichment
  33. 2026-09-17 19:55 UTCEG score recompute
  34. 2026-09-17 19:55 UTCVendor advisory
  35. 2026-09-17 19:55 UTCGHSA enrichment
  36. 2026-09-17 09:26 UTCVendor advisory
  37. 2026-09-17 09:26 UTCGHSA enrichment
  38. 2026-09-16 22:12 UTCVendor advisory
  39. 2026-09-16 22:12 UTCGHSA enrichment
  40. 2026-09-16 21:16 UTCEG score recompute
  41. 2026-09-16 21:16 UTCVendor advisory
  42. 2026-09-16 21:16 UTCGHSA enrichment
  43. 2026-09-16 14:08 UTCEPSS rescore
  44. 2026-09-16 10:02 UTCEG score recompute
  45. 2026-09-16 10:02 UTCVendor advisory
  46. 2026-09-16 10:02 UTCGHSA enrichment
  47. 2026-09-16 05:15 UTCEPSS rescore
  48. 2026-09-15 22:48 UTCVendor advisory
  49. 2026-09-15 22:48 UTCGHSA enrichment
  50. 2026-09-15 18:01 UTCVendor advisory
  51. 2026-09-15 18:01 UTCGHSA enrichment
  52. 2026-09-15 10:12 UTCEG score recompute
  53. 2026-09-15 10:12 UTCVendor advisory
  54. 2026-09-15 10:12 UTCGHSA enrichment
  55. 2026-09-15 03:12 UTCEPSS rescore
  56. 2026-09-15 03:12 UTCEPSS rescore
  57. 2026-09-14 22:58 UTCVendor advisory
  58. 2026-09-14 22:58 UTCGHSA enrichment
  59. 2026-09-14 17:50 UTCVendor advisory
  60. 2026-09-14 17:50 UTCGHSA enrichment
  61. 2026-09-14 07:10 UTCVendor advisory
  62. 2026-09-14 07:10 UTCGHSA enrichment
  63. 2026-09-13 19:57 UTCEG score recompute
  64. 2026-09-13 19:57 UTCVendor advisory
  65. 2026-09-13 19:57 UTCGHSA enrichment
  66. 2026-09-13 08:43 UTCVendor advisory
  67. 2026-09-13 08:43 UTCGHSA enrichment
  68. 2026-09-12 21:29 UTCEG score recompute
  69. 2026-09-12 21:29 UTCVendor advisory
  70. 2026-09-12 21:29 UTCGHSA enrichment
  71. 2026-09-12 10:15 UTCVendor advisory
  72. 2026-09-12 10:15 UTCGHSA enrichment
  73. 2026-09-11 23:00 UTCVendor advisory
  74. 2026-09-11 23:00 UTCGHSA enrichment
  75. 2026-09-11 19:44 UTCVendor advisory

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78523?
CVE-2026-78523 is a high vulnerability published on September 8, 2026. Use after free in Windows DNS allows an unauthorized attacker to deny service over a network.
When was CVE-2026-78523 disclosed?
CVE-2026-78523 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78523 actively exploited?
CVE-2026-78523 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 39.3% of all scored CVEs.
What is the CVSS score of CVE-2026-78523?
CVE-2026-78523 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-78523?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78523, 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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