Advisoriesby IbisMicrosoftCVE-2026-55011
Microsoft Malware Protection Engine: integer overflow
Fix: upgrade to 1.1.26060.3008 or later
Integer underflow (wrap or wraparound) in Microsoft Defender allows an unauthorized attacker to execute code locally.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Microsoft Malware Protection Engine Product | >= 1.1.0.0, < 1.1.26060.3008 | 1.1.26060.3008 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-191