What is CVE-2026-45595?

CVE-2026-45595 is a medium-severity vulnerability in Microsoft Windows_10_1607, classified under Protection Mechanism Failure. CVSS score: 5.4/10. Published 2026-06-09.

How severe is CVE-2026-45595?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Microsoft Windows_10_1607

CVE-2026-45595

Protection mechanism failure in Windows Mark of the Web (MOTW) allows an unauthorized attacker to bypass a security feature over a network.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L.

Affected products

Microsoft Windows_10_1607
Microsoft Windows_10_1809
Microsoft Windows_10_21h2
Microsoft Windows_10_22h2
Microsoft Windows_11_23h2
Microsoft Windows_11_24h2
Microsoft Windows_11_25h2
Microsoft Windows_11_26h1
Microsoft Windows_server_2012 — versions r2
Microsoft Windows_server_2016

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

secure@microsoft.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-45595?: CVE-2026-45595 is a medium-severity vulnerability in Microsoft Windows_10_1607, classified under Protection Mechanism Failure. CVSS score: 5.4/10. Published 2026-06-09.
How severe is CVE-2026-45595?: Medium severity. CVSS v3 base score is 5.4 out of 10.