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Vulnerability details

CVE-2026-62871

Microsoft NET runtimeMicrosoft Visual Studio

.NET Elevation of Privilege Vulnerability

CVSS 3.1
7.8High

Official description

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

CVSS scores

ScoreVersionSourceVector
7.8High 3.1 CVEProject cvelistV5 (CNA) (microsoft) CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Affected products

VendorProductVersionsSource
Microsoft .NET 8.0 runtime 8.0.0 ≤ v < 8.0.30 CVEProject cvelistV5 (CNA)
Microsoft .NET 9.0 runtime 9.0.0 ≤ v < 9.0.19 CVEProject cvelistV5 (CNA)
Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.0 ≤ v < 17.14.38 CVEProject cvelistV5 (CNA)
Microsoft Microsoft Visual Studio 2026 version 18.8 18.0 ≤ v < 18.8.3 CVEProject cvelistV5 (CNA)

References and advisories

1
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Details

Published
2026-08-11
Last updated
2026-10-30
State
Published
Assigner (CNA)
microsoft

Exploit prediction (EPSS)

0.46%
Probability of exploitation in 30 days
40.5%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-787
    Out-of-bounds Write
  • CWE-122
    Heap-based Buffer Overflow