How severe is CVE-2026-50656?

CVE-2026-50656 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-50656 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-50656?

CVE-2026-50656 affects Microsoft Malware Protection Engine. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-50656?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-50656 have an EU (EUVD) identifier?

Yes. CVE-2026-50656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37141.

When was CVE-2026-50656 published?

CVE-2026-50656 was published on 2026-06-16 and last updated on 2026-06-17.

CVE-2026-50656

CVE-2026-50656 is a high-severity vulnerability in Microsoft Malware Protection Engine with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-59.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37141
Weakness: CWE-59
Affected product: Microsoft Malware Protection Engine
Published: 2026-06-16
Last modified: 2026-06-17

Description

Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ". We are working to provide a high quality security update that addresses this vulnerability. We will provide information in this CVE when the update is available.

Frequently asked questions

What is CVE-2026-50656?: Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ". We are working to provide a high quality security update that addresses this vulnerability. We will provide information in this CVE when the update is available.
How severe is CVE-2026-50656?: CVE-2026-50656 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-50656 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-50656?: CVE-2026-50656 affects Microsoft Malware Protection Engine. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-50656?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-50656 have an EU (EUVD) identifier?: Yes. CVE-2026-50656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37141.
When was CVE-2026-50656 published?: CVE-2026-50656 was published on 2026-06-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:malware_protection_engine:-:*:*:*:*:*:*:*

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