Microsoft · Information disclosure, sandbox escape
Affects MicrosoftSource GCVE Database
Not known to be exploited · CVSS 8.6 High · patch available : patch Microsoft soon.
Data as of 14 Nov 2026, 09:02 UTC
- Patch
- Available
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 19 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Security Response Center Microsoft | Affected
| Fixed in
|
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.