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Fencer Vulns
high 8.8

CVE-2026-69522 json

.NET and Visual Studio Remote Code Execution Vulnerability

published 2026-09-08 2 mo ago modified 2026-11-04 5 d ago also GHSA-2j8r-3c22-8565 , EUVD-2026-73170

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.

Patch / fix

  • nuget Microsoft.DiaSymReader.Native 18.9.0-beta1.26405.2
  • Microsoft .NET 10.0 runtime 10.0.12
  • Microsoft .NET 11.0 runtime 11.0 RC1
  • Microsoft .NET 8.0 runtime 8.0.31
  • Microsoft .NET 9.0 runtime 9.0.20
  • Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 2.0.50727.8984 & 3.0.30729.8980 & 4.7.4145.0
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4145.0
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4806.0
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8.1 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9347.0
  • Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.7.4145.0
  • Microsoft Microsoft .NET Framework 4.8 4.8.4806.0
  • Microsoft Microsoft .NET Framework 4.8.1 4.8.9347.0
  • Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.40
  • Microsoft Microsoft Visual Studio 2026 version 18.9 18.9.3
  • dotnet8-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 8.0.31-r0
  • dotnet9-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 9.0.20-r0
  • dotnet10-runtime Alpine 3.23 10.0.13-r0
  • dotnet10-runtime Alpine 3.24 10.0.12-r0

alpine advisories ALPINE-CVE-2026-69522

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 mo ago

Exploit prediction

0.84% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
nuget Microsoft.DiaSymReader.Native
>=17.10.0-beta1.24272.1, <18.9.0-beta1.26405.2
18.9.0-beta1.26405.2

Affected products

  • Microsoft .NET 10.0 runtime
  • Microsoft .NET 11.0 runtime
  • Microsoft .NET 8.0 runtime
  • Microsoft .NET 9.0 runtime
  • Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8.1
  • Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2
  • Microsoft Microsoft .NET Framework 4.8
  • Microsoft Microsoft .NET Framework 4.8.1
  • Microsoft Microsoft Visual Studio 2022 version 17.14
  • Microsoft Microsoft Visual Studio 2026 version 18.9

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.