CVE-2026-70354

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 78% 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: epss, nvd
Trending — 3 sources updated this week
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

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

Out-of-bounds write in .NET allows an unauthorized attacker to execute code 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
22%
KEV
Not listed

Published

August 11, 2026

Last Modified

September 16, 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-2026-70354

Vendor Advisories for CVE-2026-70354(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 rangeFixed inDependents
Microsoft.WindowsDesktop.App.Runtime.win-arm648.0.0 ... 8.0.8 (29 versions)8.0.30—
Microsoft.WindowsDesktop.App.Runtime.win-x648.0.0 ... 8.0.8 (29 versions)8.0.30—
Microsoft.WindowsDesktop.App.Runtime.win-x868.0.0 ... 8.0.8 (29 versions)8.0.30—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 122× 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 198 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-70354?
CVE-2026-70354 is a high vulnerability published on August 11, 2026. Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.
When was CVE-2026-70354 disclosed?
CVE-2026-70354 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70354 actively exploited?
CVE-2026-70354 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 77.7% of all scored CVEs.
What is the CVSS score of CVE-2026-70354?
CVE-2026-70354 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-70354?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70354, 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-2026-70354

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