CVE-2026-62898

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 1.0% (62nd percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:microsoft, epss
Trending — 3 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: 1.0%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100CISA 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.0%
EPSS %ILE
62nd
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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-2026-62898

Vendor Advisories for CVE-2026-62898(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 1 ecosystem)
NuGet(3)
PackageVulnerable rangeFix by version rangeDependents
Microsoft.NETCore.App.Runtime.win-arm648.0.0 ... 8.0.8 (29 versions)
  • 10.0.0 up to 10.0.11: fixed in 10.0.11
  • 9.0.0 up to 9.0.19: fixed in 9.0.19
  • 8.0.0 up to 8.0.30: fixed in 8.0.30
—
Microsoft.NETCore.App.Runtime.win-x648.0.0 ... 8.0.8 (29 versions)
  • 10.0.0 up to 10.0.11: fixed in 10.0.11
  • 9.0.0 up to 9.0.19: fixed in 9.0.19
  • 8.0.0 up to 8.0.30: fixed in 8.0.30
—
Microsoft.NETCore.App.Runtime.win-x868.0.0 ... 8.0.8 (29 versions)
  • 10.0.0 up to 10.0.11: fixed in 10.0.11
  • 9.0.0 up to 9.0.19: fixed in 9.0.19
  • 8.0.0 up to 8.0.30: fixed in 8.0.30
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 97× 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 236 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-62898?
CVE-2026-62898 is a high vulnerability published on August 11, 2026. Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.
When was CVE-2026-62898 disclosed?
CVE-2026-62898 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-2026-62898 actively exploited?
CVE-2026-62898 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (62nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-62898?
CVE-2026-62898 has a CVSS base score of 7.5 (the CNA's own assessment, by microsoft; NVD's own analysis pending).
How do I remediate CVE-2026-62898?
A fix for CVE-2026-62898 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-62898 are linked in the Vendor Advisories panel on this page.

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