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.
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