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Vulnerabilities

Vulnerability · CVE-2026-62871

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

Published Aug 11, 2026 · catalog updated Oct 28, 2026 · Out-of-bounds write in .NET

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-62871. EPSS is 0.47%. Act only if a listed version of Out-of-bounds write in .NET is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Out-of-bounds write in .NET).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.47%
Remediation
Version ranges on file
Affected products
cpe microsoft/.net · cpe microsoft/visual studio 2022 · cpe microsoft/visual studio 2026

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/.net< 10.0.11
  • cpe microsoft/.net< 8.0.30
  • cpe microsoft/.net< 9.0.19
  • cpe microsoft/visual studio 2022< 17.14.38
  • cpe microsoft/visual studio 2026< 18.8.3

How to fix CVE-2026-62871

  • Upgrade

    CVE-2026-62871 lists a fix boundary at 10.0.11. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 10.0.11

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-62871. EPSS is 0.47%. Act only if a listed version of Out-of-bounds write in .NET is installed.

Which versions are affected?

Compare what you have installed with microsoft/visual studio 2022 < 17.14.38; microsoft/visual studio 2026 < 18.8.3. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-122: Heap-based Buffer Overflow; CWE-787: Out-of-bounds Write. EPSS 0.47%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 11, 2026 · NIST NVD

    Detected

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

  2. Oct 28, 2026 · NIST NVD

    Updated

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

Sources

  • CVE.orgVulnerability recordCVE-2026-62871

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-62871

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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 29, 2026
  • NIST NVDOct 29, 2026