CVE-2026-48573

CVE-2026-48573 is a high-severity vulnerability in Microsoft Windows 10 1607 with a CVSS 3.x base score of 7.9. 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-1329.

Key facts

• Severity: High (CVSS 3.x base score 7.9)
• EPSS exploit prediction: 1% (60th percentile)
• Actively exploited: Not listed in CISA KEV
• EU (EUVD) id: EUVD-2026-35523
• Weakness: CWE-1329
• Affected product: Microsoft Windows 10 1607
• Published: 2026-06-09
• Last modified: 2026-06-17

Description

Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

Frequently asked questions

What is CVE-2026-48573?

Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

How severe is CVE-2026-48573?

CVE-2026-48573 has a CVSS 3.x base score of 7.9, rated high severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-48573 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-48573?

CVE-2026-48573 primarily affects Microsoft Windows 10 1607. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-48573?

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-2026-48573 have an EU (EUVD) identifier?

Yes. CVE-2026-48573 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35523.

When was CVE-2026-48573 published?

CVE-2026-48573 was published on 2026-06-09 and last updated on 2026-06-17.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48573

Affected products (24)

• cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*

More vulnerabilities in Microsoft Windows 10 1607

• CVE-2026-47291 — Critical (CVSS 9.8): Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code over a network.
• CVE-2026-44815 — Critical (CVSS 9.8): Stack-based buffer overflow in Windows DHCP Client allows an unauthorized attacker to execute code over a network.
• CVE-2026-33824 — Critical (CVSS 9.8): Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.
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• CVE-2025-47981 — Critical (CVSS 9.8): Heap-based buffer overflow in Windows SPNEGO Extended Negotiation allows an unauthorized attacker to execute code over…

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Other CWE-1329 vulnerabilities

• CVE-2022-34381 — Critical (CVSS 9.1): Dell BSAFE SSL-J version 7.0 and all versions prior to 6.5, and Dell BSAFE Crypto-J versions prior to 6.2.6.1 contain…
• CVE-2026-48576 — High (CVSS 7.9): Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
• CVE-2026-41097 — Medium (CVSS 6.7): Reliance on a component that is not updateable in Windows Secure Boot allows an authorized attacker to bypass a…
• CVE-2021-38398 — Medium (CVSS 6.5): The affected device uses off-the-shelf software components that contain unpatched vulnerabilities. A malicious attacker…
• CVE-2026-21265 — Medium (CVSS 6.4): Windows Secure Boot stores Microsoft certificates in the UEFI KEK and DB. These original certificates are approaching…

Browse all CWE-1329 vulnerabilities →