Microsoft · Undefined Behavior
Affects MicrosoftSource GCVE Database
Not known to be exploited · CVSS 8.1 High.
Data as of 14 Nov 2026, 09:47 UTC
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 29 Sep 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
Users should monitor official Microsoft advisories for updates regarding fixes or mitigation guidance for this vulnerability.
Description
CVE-2026-100771 is a vulnerability in Microsoft software version 4.0 related to undefined behavior in the DOM Streams component. The issue is categorized under CWE-758, which involves undefined behavior. No CVSS score or detailed impact information is provided, and no known exploits or patches are currently documented.