How severe is CVE-2026-45647?

CVE-2026-45647 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-45647 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45647?

CVE-2026-45647 affects Microsoft Defender For Endpoint. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45647?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45647 have an EU (EUVD) identifier?

Yes. CVE-2026-45647 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35571.

When was CVE-2026-45647 published?

CVE-2026-45647 was published on 2026-06-09 and last updated on 2026-06-19.

CVE-2026-45647

CVE-2026-45647 is a medium-severity vulnerability in Microsoft Defender For Endpoint with a CVSS 3.x base score of 5.5. 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-367.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35571
Weakness: CWE-367
Affected product: Microsoft Defender For Endpoint
Published: 2026-06-09
Last modified: 2026-06-19

Description

Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.

Frequently asked questions

What is CVE-2026-45647?: Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-45647?: CVE-2026-45647 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-45647 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45647?: CVE-2026-45647 affects Microsoft Defender For Endpoint. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45647?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45647 have an EU (EUVD) identifier?: Yes. CVE-2026-45647 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35571.
When was CVE-2026-45647 published?: CVE-2026-45647 was published on 2026-06-09 and last updated on 2026-06-19.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45647

Affected products (1)

cpe:2.3:a:microsoft:defender_for_endpoint:*:*:*:*:*:macos:*:*

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