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CVE-2026-74938VulnerabilityPublished Updated

Microsoft · Mitigation Bypass

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-74938· Critical 9.1

Not known to be exploited · CVSS 9.1 Critical.

Data as of 14 Nov 2026, 09:18 UTC

CVSS 3.1 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Aug 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
  • <154
  • <=153.1
Fixed in
  • 154

Description

CVE-2026-74938 is a vulnerability in the JavaScript: GC component of Microsoft software version 4.0. The vulnerability involves a mitigation bypass related to the garbage collection mechanism. No CVSS score or detailed impact information is provided.

References

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