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Δ / VULNERABILITY RECORD

CVE-2026-70354.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSHIGH / 7.8No severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Aug 13, 2026

Disclosure summary

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

Source-reported weakness categories

CWE-787

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

Microsoft Security Updates (CVRF) · 2026-Aug

Open original source · Updated Aug 13, 2026

.NET Core Remote Code Execution Vulnerability

Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.

Microsoft maximum product score: 7.8

VendorProduct / associationVersion / bounds
Microsoft update guideMicrosoft .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 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 on Windows Server 2012 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 on Windows 11 Version 26H1 for ARM64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 on Windows Server 2012 R2 (MSRC status code 3)
Microsoft update guideMicrosoft .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 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for ARM64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for x64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for 32-bit Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for x64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for ARM64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for ARM64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for 32-bit Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for x64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for ARM64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for ARM64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for x64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for 32-bit Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for 32-bit Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.8 on Windows Server 2012 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.8 on Windows Server 2016 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft Visual Studio 2026 version 18.8 (MSRC status code 3)
Microsoft update guideMicrosoft Visual Studio 2022 version 17.14 (MSRC status code 3)
Microsoft update guide.NET 9.0 installed on Windows (MSRC status code 3)
Microsoft update guide.NET 8.0 installed on Windows (MSRC status code 3)
Microsoft update guide.NET 10.0 installed on Windows (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 on Windows 11 version 26H1 for x64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for x64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for x64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for ARM64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for ARM64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for ARM64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for x64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.8 on Windows Server 2012 R2 (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.8.1 on Windows 11 version 26H1 for x64-based Systems (MSRC status code 3)
Microsoft update guideMicrosoft .NET Framework 4.8.1 on Windows 11 Version 26H1 for ARM64-based Systems (MSRC status code 3)

Vendor remediation references

  • 5120418 · build 2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0 · product IDs 11723-10852, 11723-10853, 11723-10816, 11723-10855
  • Vendor guidance · product IDs 11723-10852, 11723-10853, 11723-10816, 11723-10855
  • 5120716 · build 2.0.50727.8984 & 3.0.30729.8980 · product IDs 2472-10378, 2472-10379
  • Vendor guidance · product IDs 2472-10378, 2472-10379
  • 5120747 · build 2.0.50727.9183 & 3.0.30729.9169 · product IDs 2472-20854, 2472-20853
  • Vendor guidance · product IDs 2472-20854, 2472-20853
  • 5120695 · build 2.0.50727.8984 & 3.0.30729.8980 · product IDs 2472-10483, 2472-10543
  • Vendor guidance · product IDs 2472-10483, 2472-10543
  • 5120703 · build 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0 · product IDs 11676-11568, 11676-11569, 11676-11570, 11676-11571, 11676-11572
  • Vendor guidance · product IDs 11676-11568, 11676-11569, 11676-11570, 11676-11571, 11676-11572
  • 5120698 · build 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0 · product IDs 11677-11568, 11677-11570, 11677-11571, 11677-11572, 11677-11569
  • Vendor guidance · product IDs 11677-11568, 11677-11570, 11677-11571, 11677-11572, 11677-11569
  • 5120701 · build 2.0.50727.9183 & 3.0.30729.9169 & 4.8.4805.0 · product IDs 11676-12097, 11676-11929, 11676-11931, 11676-11930, 11676-12098, 11676-12099
  • Vendor guidance · product IDs 11676-12097, 11676-11929, 11676-11931, 11676-11930, 11676-12098, 11676-12099
  • 5120705 · build 2.0.50727.9183 & 3.0.30729.9169 & 4.8.4805.0 · product IDs 11676-11924, 11676-11923
  • Vendor guidance · product IDs 11676-11924, 11676-11923
  • 5120709 · build 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0 · product IDs 12079-11931, 12079-12098, 12079-11930, 12079-12097, 12079-11929, 12079-12099
  • Vendor guidance · product IDs 12079-11931, 12079-12098, 12079-11930, 12079-12097, 12079-11929, 12079-12099
  • 5120714 · build 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0 · product IDs 12079-11924, 12079-11923
  • Vendor guidance · product IDs 12079-11924, 12079-11923
  • 5120700 · build 4.7.4144.0 · product IDs 11863-10543, 11863-10483
  • Vendor guidance · product IDs 11863-10543, 11863-10483
  • 5120699 · build 4.7.4144.0 · product IDs 11863-10379, 11863-10378
  • Vendor guidance · product IDs 11863-10379, 11863-10378
  • 5120702 · build 4.8.4805.0 · product IDs 11650-10855, 11650-10853, 11650-10852, 11650-10816
  • Vendor guidance · product IDs 11650-10855, 11650-10853, 11650-10852, 11650-10816
  • 5120704 · build 4.8.4805.0 · product IDs 11650-10378, 11650-10379
  • Vendor guidance · product IDs 11650-10378, 11650-10379
  • Vendor guidance · build 18.8.3 · product IDs 21681
  • Vendor guidance · product IDs 21681
  • Vendor guidance · build 17.14.38 · product IDs 16767
  • Vendor guidance · product IDs 16767
  • 5122105 · build 9.0.19 · product IDs 12434
  • Vendor guidance · product IDs 12434
  • 5122104 · build 8.0.30 · product IDs 12414
  • Vendor guidance · product IDs 12414
  • 5122106 · build 10.0.11 · product IDs 20837
  • Vendor guidance · product IDs 20837
  • 5120708 · build 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9344.0 · product IDs 12079-12437, 12079-20438, 12079-20437, 12079-12436
  • Vendor guidance · product IDs 12079-12437, 12079-20438, 12079-20437, 12079-12436
  • 5120710 · build 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0 · product IDs 12079-12390, 12079-12389
  • Vendor guidance · product IDs 12079-12390, 12079-12389
  • 5120713 · build 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0 · product IDs 12079-12242, 12079-12243
  • Vendor guidance · product IDs 12079-12242, 12079-12243
  • 5120706 · build 4.8.4805.0 · product IDs 11650-10543, 11650-10483
  • Vendor guidance · product IDs 11650-10543, 11650-10483
  • 5120711 · build 4.8.9344.0 · product IDs 12078-20853, 12078-20854
  • Vendor guidance · product IDs 12078-20853, 12078-20854

Original records & references

PUBLISHED 2026-08-11T03:00:00-04:00
MODIFIED 2026-08-13T03:00:00-04:00
INGESTED 2026-10-08T12:40:38-04:00