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CVE-2026-86411VulnerabilityPublished Updated

Microsoft · FTP connection reuse inherits client-certificate

Affects MicrosoftSource GCVE Database

0
Authoritative record:CVE-2026-86411· High

Not known to be exploited.

Data as of 28 Oct 2026, 09:13 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
curlcurlAffected
  • >=8.21.0 <=8.21.0
Fixed in–

Description

This vulnerability involves FTP connection reuse inheriting the client-certificate, potentially causing unintended certificate sharing across FTP sessions. The issue affects Microsoft product version 3.0. No CVSS score or detailed impact information is provided.

References

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