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CVE-2026-8958VulnerabilityPublished

Microsoft · Information disclosure, sandbox escape

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-8958· High 8.6

Not known to be exploited · CVSS 8.6 High · patch available : patch Microsoft soon.

Data as of 14 Nov 2026, 09:02 UTC

CVSS 3.1 base score
8.6High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: 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 13 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Microsoft Security Response Center MicrosoftAffected
  • <151
Fixed in
  • 151

AI-suggested

No specific mitigation steps are available from the provided data.

Description

CVE-2026-8958 is a vulnerability in the Microsoft Security: Process Sandboxing component that can lead to information disclosure and sandbox escape. The affected version is 4.0. No CVSS score or detailed technical information is provided. No known exploits in the wild have been reported.

References

Community reviews

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