CVE-2026-70354HighMicrosoft CVSS 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Microsoft security update for CVE-2026-70354

Published
August 14, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2026-70354 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70354. This page also shows what EchelonGraph holds for CVE-2026-70354, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products63

  • .NET 10.0 runtime installed on Windows
  • .NET 8.0 runtime installed on Windows
  • .NET 9.0 runtime installed on Windows
  • Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems
  • Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016
  • Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation)
  • Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems
  • Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019
  • Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for ARM64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for 32-bit Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for ARM64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for x64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for 32-bit Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for ARM64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for x64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation)
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 (Server Core installation)
  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for 32-bit Systems
  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for ARM64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for x64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for 32-bit Systems
  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for ARM64-based Systems
  • +33 more not shown

✅ Updates Microsoft lists: 19 KB articles and 5 other updates

24 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB articleUpdateFixed build
KB5120418Security Update2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0
KB5120716Security Update2.0.50727.8984 & 3.0.30729.8980
KB5120747Security Update2.0.50727.9183 & 3.0.30729.9169
KB5120695Security Update2.0.50727.8984 & 3.0.30729.8980
KB5120703Security Update2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0
KB5120698Security Update2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0
KB5120701Security Update2.0.50727.9183 & 3.0.30729.9169 & 4.8.4805.0
KB5120705Security Update2.0.50727.9183 & 3.0.30729.9169 & 4.8.4805.0
KB5120709Security Update2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0
KB5120714Security Update2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0
KB5120700Security Update4.7.4144.0
KB5120699Security Update4.7.4144.0
KB5120702Security Update4.8.4805.0
KB5120704Security Update4.8.4805.0
—Security Update18.8.3
—Security Update17.14.38
—Security Update9.0.19
—Security Update8.0.30
—Security Update10.0.11
KB5120708Security Update2.0.50727.9183 & 3.0.30729.9169 & 4.8.9344.0
KB5120710Security Update2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0
KB5120713Security Update2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0
KB5120706Security Update4.8.4805.0
KB5120711Security Update4.8.9344.0

🧭 EchelonGraph on CVE-2026-70354

EchelonGraph score
7.8 HIGH
CISA KEV
Not listed
Fix status
A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.

Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2026-70354, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 References (45)