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CVE-2026-4718VulnerabilityPublished

Microsoft · Undefined Behavior

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-4718· High 8.1

Not known to be exploited · CVSS 8.1 High · patch available : patch Microsoft soon.

Data as of 14 Nov 2026, 10:01 UTC

CVSS 3.1 base score
8.1High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 Mar 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
  • <149
Fixed in
  • 149

Description

CVE-2026-4718 is a vulnerability in the WebRTC signaling component of Microsoft software version 4.0, involving undefined behavior. No detailed technical information or impact specifics are provided. No CVSS score or exploit in the wild is reported.

References

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