CVE-2026-26131

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 71% of all CVEs by exploit prediction. 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
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally.

CVSS v3
7.8
EG Score
7.8(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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

March 10, 2026

Last Modified

June 19, 2026

Advisory Details (1)

Auto-updated Jun 23, 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-2026-26131

Vendor Advisories for CVE-2026-26131(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatdotnet10-0-main-10.0.106-1.hum12026-04-20redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 1 ecosystem)
NuGet(6)
PackageVulnerable rangeFixed inDependents
Microsoft.NetCore.App.Runtime.linux-arm10.0.0, 10.0.1, 10.0.2, 10.0.310.0.4—
Microsoft.NetCore.App.Runtime.linux-arm6410.0.0, 10.0.1, 10.0.2, 10.0.310.0.4—
Microsoft.NetCore.App.Runtime.linux-musl-arm10.0.0, 10.0.1, 10.0.2, 10.0.310.0.4—
Microsoft.NetCore.App.Runtime.linux-musl-arm6410.0.0, 10.0.1, 10.0.2, 10.0.310.0.4—
Microsoft.NetCore.App.Runtime.linux-musl-x6410.0.0, 10.0.1, 10.0.2, 10.0.310.0.4—
Microsoft.NetCore.App.Runtime.linux-x6410.0.0, 10.0.1, 10.0.2, 10.0.310.0.4—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 52× 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 112 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-26131?
CVE-2026-26131 is a high vulnerability published on March 10, 2026. Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally.
When was CVE-2026-26131 disclosed?
CVE-2026-26131 was first published in the National Vulnerability Database on March 10, 2026, with the most recent update on June 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-26131 actively exploited?
CVE-2026-26131 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 71.4% of all scored CVEs.
What is the CVSS score of CVE-2026-26131?
CVE-2026-26131 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-26131?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-26131, 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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