CVE-2026-56178
CVE-2026-56178 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% (6th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-367
- Affected product: Microsoft Defender For Endpoint
- Published:
- Last modified:
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-2026-56178?
- 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-2026-56178?
- CVE-2026-56178 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-2026-56178 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-56178?
- CVE-2026-56178 affects Microsoft Defender For Endpoint. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-56178?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2026-56178 published?
- CVE-2026-56178 was published on 2026-07-14 and last updated on 2026-07-22.
References
Affected products (1)
- cpe:2.3:a:microsoft:defender_for_endpoint:*:*:*:*:*:macos:*:*
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