CVE-2025-26678: Improper access control in Windows Defender Application Control (WDAC) allows an unauthorized attacker to bypass a security feature locally

High severity · published Apr 8, 2025

CVE-2025-26678

Improper access control in Windows Defender Application Control (WDAC) allows an unauthorized attacker to bypass a security feature locally

8.4

CVSS

0.5%

EPSS

On KEV

Description

Improper access control in Windows Defender Application Control (WDAC) allows an unauthorized attacker to bypass a security feature locally.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector

Local

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.5% · higher than 45% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Windows 10 1809 · Microsoft

before 10.0.17763.7136; before 10.0.17763.7136 · source: NVD

Windows 10 21h2 · Microsoft

before 10.0.19044.5737 · source: NVD

Windows 10 22h2 · Microsoft

before 10.0.19045.5737 · source: NVD

Windows 11 22h2 · Microsoft

before 10.0.22621.5189 · source: NVD

Windows 11 23h2 · Microsoft

before 10.0.22631.5189 · source: NVD

Windows 11 24h2 · Microsoft

before 10.0.26100.3775 · source: NVD

Windows Server 2019 · Microsoft

before 10.0.17763.7136 · source: NVD

Windows Server 2022 · Microsoft

before 10.0.20348.3453 · source: NVD

Windows Server 2022 23h2 · Microsoft

before 10.0.25398.1551 · source: NVD

Windows Server 2025 · Microsoft

before 10.0.26100.3775 · source: NVD

Affected product

Windows 10 1809

Microsoft

All Windows 10 1809 CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2025-26678

CVE.org

https://www.cve.org/CVERecord?id=CVE-2025-26678

Vendor Advisory

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26678