SEPTEMBER 13, 2026
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Case File

CVE-2026-55011

HIGH · CVSS 7.8 EPSS 0.37%

Source: NVD + CISA KEV + EPSS · Published 2026-07-14 · Last synced 2026-08-13

CyberRota Analysis

AI-Generated

Microsoft Defender is vulnerable to an integer underflow issue that allows unauthorized attackers to execute code locally on affected systems. This high-severity vulnerability poses a significant risk to the integrity and security of endpoints running Microsoft Defender. Organizations using this software should prioritize patching to mitigate potential exploitation.

CVE
CVE-2026-55011
Severity
HIGH
CVSS
7.8
EPSS
0.37%
Microsoft

Original NVD Description

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

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-87654 CRITICAL CVE-2026-87653 MEDIUM CVE-2026-87648 HIGH CVE-2026-87644 HIGH CVE-2026-87621 CRITICAL CVE-2026-87618 HIGH