How severe is CVE-2025-59497?

CVE-2025-59497 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-59497 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59497?

CVE-2025-59497 affects Microsoft Defender For Endpoint. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-59497?

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-2025-59497 have an EU (EUVD) identifier?

Yes. CVE-2025-59497 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34266.

When was CVE-2025-59497 published?

CVE-2025-59497 was published on 2025-10-14 and last updated on 2026-06-17.

CVE-2025-59497

CVE-2025-59497 is a high-severity vulnerability in Microsoft Defender For Endpoint with a CVSS 3.x base score of 7.0. 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: High (CVSS 3.x base score 7.0)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-34266
Weakness: CWE-367
Affected product: Microsoft Defender For Endpoint
Published: 2025-10-14
Last modified: 2026-06-17

Description

Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Linux allows an authorized attacker to deny service locally.

Frequently asked questions

What is CVE-2025-59497?: Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Linux allows an authorized attacker to deny service locally.
How severe is CVE-2025-59497?: CVE-2025-59497 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-59497 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59497?: CVE-2025-59497 affects Microsoft Defender For Endpoint. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-59497?: 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-2025-59497 have an EU (EUVD) identifier?: Yes. CVE-2025-59497 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34266.
When was CVE-2025-59497 published?: CVE-2025-59497 was published on 2025-10-14 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59497

Affected products (1)

cpe:2.3:a:microsoft:defender_for_endpoint:*:*:*:*:*:linux:*:*

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