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Description

Integer underflow (wrap or wraparound) in Microsoft Defender allows an unauthorized attacker to execute code locally.

PUBLISHED Reserved 2026-06-16 | Published 2026-07-14 | Updated 2026-07-14 | Assigner microsoft




HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Problem types

CWE-191: Integer Underflow (Wrap or Wraparound)

Product status

1.1.0.0 (custom) before 1.1.26060.3008
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55011 (Microsoft Defender Remote Code Execution Vulnerability) vendor-advisory patch

cve.org (CVE-2026-55011)

nvd.nist.gov (CVE-2026-55011)

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