CVE-2026-50659

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 56% 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
Trending — Patch released this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

Improper encoding or escaping of output in .NET allows an authorized attacker to perform spoofing over a network.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

July 14, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Jul 15, 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-2026-50659

Vendor Advisories for CVE-2026-50659(19)

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

Patch Availability(18)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntudotnet10 (10.0.110-10.0.10-0ubuntu1~26.04.1) @ resolute2026-08-30ubuntu
redhatdotnet8.0-0:8.0.130-1.el9_62026-08-24redhat
redhatdotnet9.0-0:9.0.120-1.el9_62026-08-24redhat
redhatdotnet8.0-0:8.0.130-1.el9_42026-08-24redhat
redhatdotnet8.0-0:8.0.130-1.el10_02026-08-24redhat
redhatdotnet9.0-0:9.0.120-1.el10_02026-08-24redhat
redhatdotnet9.0-0:9.0.119-1.el9_82026-07-20redhat
redhatdotnet8-0-main-8.0.129-2.1.hum12026-07-20redhat
redhatdotnet9.0-0:9.0.119-1.el10_22026-07-20redhat
redhatdotnet10.0-0:10.0.110-1.el10_22026-07-20redhat
redhatdotnet10.0-0:10.0.110-1.el8_102026-07-20redhat
redhatdotnet8.0-0:8.0.129-1.el8_102026-07-20redhat
redhatdotnet9.0-0:9.0.119-1.el8_102026-07-20redhat
redhatdotnet8.0-0:8.0.129-1.el9_82026-07-20redhat
redhatdotnet10.0-0:10.0.110-1.el9_82026-07-20redhat
redhatdotnet8.0-0:8.0.129-1.el10_22026-07-20redhat
redhatdotnet9-0-main-9.0.119-1.hum12026-07-15redhat
redhatdotnet10-0-main-10.0.109-1.hum12026-06-17redhat

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

(12 across 1 ecosystem)
NuGet(12)
PackageVulnerable rangeFixed inDependents
Microsoft.NetCore.App.Runtime.linux-arm8.0.0 ... 8.0.8 (28 versions)8.0.29—
Microsoft.NetCore.App.Runtime.linux-arm648.0.0 ... 8.0.8 (28 versions)8.0.29—
Microsoft.NetCore.App.Runtime.linux-musl-arm8.0.0 ... 8.0.8 (28 versions)8.0.29—
Microsoft.NetCore.App.Runtime.linux-musl-arm648.0.0 ... 8.0.8 (28 versions)8.0.29—
Microsoft.NetCore.App.Runtime.linux-musl-x648.0.0 ... 8.0.8 (28 versions)8.0.29—
Microsoft.NetCore.App.Runtime.linux-x648.0.0 ... 8.0.8 (28 versions)8.0.29—
Microsoft.NetCore.App.Runtime.osx-arm648.0.0 ... 8.0.8 (28 versions)8.0.29—
Microsoft.NetCore.App.Runtime.osx-x648.0.0 ... 8.0.8 (28 versions)8.0.29—
Microsoft.NetCore.App.Runtime.win-arm—8.0.29—
Microsoft.NetCore.App.Runtime.win-arm648.0.0 ... 8.0.8 (28 versions)8.0.29—
Microsoft.NetCore.App.Runtime.win-x648.0.0 ... 8.0.8 (28 versions)8.0.29—
Microsoft.NetCore.App.Runtime.win-x868.0.0 ... 8.0.8 (28 versions)8.0.29—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 20× in last 7d / 93× 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 134 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-50659?
CVE-2026-50659 is a medium vulnerability published on July 14, 2026. Improper encoding or escaping of output in .NET allows an authorized attacker to perform spoofing over a network.
When was CVE-2026-50659 disclosed?
CVE-2026-50659 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50659 actively exploited?
CVE-2026-50659 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 56.4% of all scored CVEs.
What is the CVSS score of CVE-2026-50659?
CVE-2026-50659 has a CVSS v4.0 base score of 6.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-50659?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50659, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-50659

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