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CVE-2026-50659

Improper encoding or escaping of output in .NET allows an authorized attacker to perform spoofing over a network.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ced6586bc5719601e9298efc94bdd1b2f648cf7211f4ca1311b56ae84e4f990e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 13 assertions

{"platforms":["Windows 10 Version 1809 for 32-bit Systems","Windows 10 Version 1809 for x64-based Systems","Windows 10 Version 21H2 for 32-bit Systems","Windows 10 Version 21H2 for ARM64-based Systems","Windows 10 Version 21H2 for x64-based Systems","Windows 10 Version 22H2 for 32-bit Systems","Windows 10 Version 22H2 for ARM64-based Systems","Windows 10 Version 22H2 for x64-based Systems","Windows Server 2019","Windows Server 2019 (Server Core installation)","Windows Server 2022","Windows Server 2022 (Server Core installation)"],"product":"Microsoft .NET Framework 3.5 AND 4.8","vendor":"Micro…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/5

{"platforms":["Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)"],"product":"Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2","vendor":"Microsoft","versions":[{"lessThan":"4.7.4143.0","status":"affected","version":"4.7.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/7

{"platforms":["Windows 10 Version 1607 for 32-bit Systems","Windows 10 Version 1607 for x64-based Systems","Windows 10 Version 1809 for 32-bit Systems","Windows 10 Version 1809 for x64-based Systems","Windows Server 2016","Windows Server 2016 (Server Core installation)","Windows Server 2019","Windows Server 2019 (Server Core installation)"],"product":"Microsoft .NET Framework 3.5 AND 4.7.2","vendor":"Microsoft","versions":[{"lessThan":"2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0","status":"affected","version":"4.7.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/4

{"product":".NET 9.0","vendor":"Microsoft","versions":[{"lessThan":"9.0.18","status":"affected","version":"9.0.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/2

{"platforms":["Windows 10 Version 1607 for 32-bit Systems","Windows 10 Version 1607 for x64-based Systems","Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)","Windows Server 2016","Windows Server 2016 (Server Core installation)"],"product":"Microsoft .NET Framework 4.8","vendor":"Microsoft","versions":[{"lessThan":"4.8.4803.0","status":"affected","version":"4.8.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/8

{"platforms":["Windows 10 Version 21H2 for 32-bit Systems","Windows 10 Version 21H2 for ARM64-based Systems","Windows 10 Version 21H2 for x64-based Systems","Windows 10 Version 22H2 for 32-bit Systems","Windows 10 Version 22H2 for ARM64-based Systems","Windows 10 Version 22H2 for x64-based Systems","Windows 11 Version 23H2 for ARM64-based Systems","Windows 11 Version 23H2 for x64-based Systems","Windows 11 Version 24H2 for ARM64-based Systems","Windows 11 Version 24H2 for x64-based Systems","Windows 11 Version 25H2 for ARM64-based Systems","Windows 11 Version 25H2 for x64-based Systems","Windo…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/6

{"product":"Microsoft Visual Studio 2026 version 18.7","vendor":"Microsoft","versions":[{"lessThan":"18.7.4","status":"affected","version":"18.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/12

{"platforms":["Windows 11 Version 26H1 for ARM64-based Systems","Windows 11 version 26H1 for x64-based Systems"],"product":"Microsoft .NET Framework 4.8.1","vendor":"Microsoft","versions":[{"lessThan":"4.8.9340.0","status":"affected","version":"4.8.0.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/9

{"product":".NET 10.0","vendor":"Microsoft","versions":[{"lessThan":"10.0.10","status":"affected","version":"10.0.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/0

{"product":".NET 8.0","vendor":"Microsoft","versions":[{"lessThan":"8.0.29","status":"affected","version":"8.0.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/1

{"product":"Microsoft Visual Studio 2022 version 17.14","vendor":"Microsoft","versions":[{"lessThan":"17.14.36","status":"affected","version":"17.14.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/11

{"product":"Microsoft Visual Studio 2022 version 17.12","vendor":"Microsoft","versions":[{"lessThan":"17.12.22","status":"affected","version":"17.12.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/10

{"platforms":["Windows 11 Version 26H1 for ARM64-based Systems","Windows 11 version 26H1 for x64-based Systems","Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)"],"product":"Microsoft .NET Framework 3.5","vendor":"Microsoft","versions":[{"lessThan":"2.0.50727.8983 & 3.0.30729.8978","status":"affected","version":"3.5.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/3

Affected products and versions

13 source assertions
{"platforms":["Windows 10 Version 1809 for 32-bit Systems","Windows 10 Version 1809 for x64-based Systems","Windows 10 Version 21H2 for 32-bit Systems","Windows 10 Version 21H2 for ARM64-based Systems","Windows 10 Version 21H2 for x64-based Systems","Windows 10 Version 22H2 for 32-bit Systems","Windows 10 Version 22H2 for ARM64-based Systems","Windows 10 Version 22H2 for x64-based Systems","Windows Server 2019","Windows Server 2019 (Server Core installation)","Windows Server 2022","Windows Server 2022 (Server Core installation)"],"product":"Microsoft .NET Framework 3.5 AND 4.8","vendor":"Micro…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/5
{"platforms":["Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)"],"product":"Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2","vendor":"Microsoft","versions":[{"lessThan":"4.7.4143.0","status":"affected","version":"4.7.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/7
{"platforms":["Windows 10 Version 1607 for 32-bit Systems","Windows 10 Version 1607 for x64-based Systems","Windows 10 Version 1809 for 32-bit Systems","Windows 10 Version 1809 for x64-based Systems","Windows Server 2016","Windows Server 2016 (Server Core installation)","Windows Server 2019","Windows Server 2019 (Server Core installation)"],"product":"Microsoft .NET Framework 3.5 AND 4.7.2","vendor":"Microsoft","versions":[{"lessThan":"2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0","status":"affected","version":"4.7.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/4
{"product":".NET 9.0","vendor":"Microsoft","versions":[{"lessThan":"9.0.18","status":"affected","version":"9.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/2
{"platforms":["Windows 10 Version 1607 for 32-bit Systems","Windows 10 Version 1607 for x64-based Systems","Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)","Windows Server 2016","Windows Server 2016 (Server Core installation)"],"product":"Microsoft .NET Framework 4.8","vendor":"Microsoft","versions":[{"lessThan":"4.8.4803.0","status":"affected","version":"4.8.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/8
{"platforms":["Windows 10 Version 21H2 for 32-bit Systems","Windows 10 Version 21H2 for ARM64-based Systems","Windows 10 Version 21H2 for x64-based Systems","Windows 10 Version 22H2 for 32-bit Systems","Windows 10 Version 22H2 for ARM64-based Systems","Windows 10 Version 22H2 for x64-based Systems","Windows 11 Version 23H2 for ARM64-based Systems","Windows 11 Version 23H2 for x64-based Systems","Windows 11 Version 24H2 for ARM64-based Systems","Windows 11 Version 24H2 for x64-based Systems","Windows 11 Version 25H2 for ARM64-based Systems","Windows 11 Version 25H2 for x64-based Systems","Windo…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/6
{"product":"Microsoft Visual Studio 2026 version 18.7","vendor":"Microsoft","versions":[{"lessThan":"18.7.4","status":"affected","version":"18.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/12
{"platforms":["Windows 11 Version 26H1 for ARM64-based Systems","Windows 11 version 26H1 for x64-based Systems"],"product":"Microsoft .NET Framework 4.8.1","vendor":"Microsoft","versions":[{"lessThan":"4.8.9340.0","status":"affected","version":"4.8.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/9
{"product":".NET 10.0","vendor":"Microsoft","versions":[{"lessThan":"10.0.10","status":"affected","version":"10.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/0
{"product":".NET 8.0","vendor":"Microsoft","versions":[{"lessThan":"8.0.29","status":"affected","version":"8.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/1
{"product":"Microsoft Visual Studio 2022 version 17.14","vendor":"Microsoft","versions":[{"lessThan":"17.14.36","status":"affected","version":"17.14.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/11
{"product":"Microsoft Visual Studio 2022 version 17.12","vendor":"Microsoft","versions":[{"lessThan":"17.12.22","status":"affected","version":"17.12.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/10
{"platforms":["Windows 11 Version 26H1 for ARM64-based Systems","Windows 11 version 26H1 for x64-based Systems","Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)"],"product":"Microsoft .NET Framework 3.5","vendor":"Microsoft","versions":[{"lessThan":"2.0.50727.8983 & 3.0.30729.8978","status":"affected","version":"3.5.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/affected/3

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":6.5,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-116","description":"CWE-116: Improper Encoding or Escaping of Output","lang":"en-US","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":".NET Spoofing Vulnerability","tags":["vendor-advisory","patch"],"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50659"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:607ca94d30241146a5f4808ca15158ef7c0c9920db9a0aa71ebe4b3ef302f9a7 · sha256:dc9ee2ca808a7db9… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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