CVE-2026-45584
HIGHCVSS 8.1/10EPSS 0.85%
Last modified
CVE-2026-45584 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.. EPSS estimates a 0.85% chance of exploitation in the next 30 days.
Description
Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Malware Protection Engine | >= 1.1.26030.3008, < 1.1.26040.8 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-45584?
Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.
How severe is CVE-2026-45584?
CVE-2026-45584 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.
How do I fix CVE-2026-45584?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-45578WWBN AVideo is an open source video platform. In 29.0 and ea…8.8
- CVE-2026-4558A flaw has been found in Linksys MR9600 2.0.6.206937. Affect…8.8
- CVE-2026-45580WWBN AVideo is an open source video platform. In 29.0 and ea…5.4
- CVE-2026-45581fabric-chaincode-java is a Java based implementation of Hype…5.5
- CVE-2026-45582n8n-MCP is an MCP server that provides AI assistants access …6.5
- CVE-2026-45583Improper control of generation of code ('code injection') in…8.1
- CVE-2026-45585Microsoft is aware of a security feature bypass vulnerabilit…6.8
- CVE-2026-45586Improper link resolution before file access ('link following…7.8
- CVE-2026-45588Protection mechanism failure in Windows Secure Boot allows a…7.9
- CVE-2026-45591Uncontrolled resource consumption in ASP.NET Core allows an …7.5
- CVE-2026-45592Integer overflow or wraparound in Windows Internet (wininet.…7.8
- CVE-2026-45593Use after free in Windows SDK allows an authorized attacker …7.8
Are you affected by CVE-2026-45584?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST