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Full vulnerability report · 2026
CVE-2026-48573High confidence

Secure Boot Security Feature Bypass Vulnerability

Microsoft · Windows 10 Version 1607

7.9HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-35523

No EUVD known-exploited evidence

No cwe for this issue in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
7.9 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

No cwe for this issue in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

What

No cwe for this issue in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

Why

The product contains a component that cannot be updated or patched in order to remove vulnerabilities or significant bugs.

How

An attacker operating through local access may attempt exploitation with elevated privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

No cwe for this issue in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

Why

The product contains a component that cannot be updated or patched in order to remove vulnerabilities or significant bugs.

How

An attacker operating through local access may attempt exploitation with elevated privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Reliance on Component That is Not Updateable → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
High: elevated access is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-1329 ↗

CWE-1329: Reliance on Component That is Not Updateable. The product contains a component that cannot be updated or patched in order to remove vulnerabilities or significant bugs.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRHighPrivileges required: The attacker needs elevated or administrative privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
CWE-1329
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-35523Official EUVD mapping

No cwe for this issue in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

Official EUVD record
BSI · German · WID-SEC-W-2026-1849Microsoft Windows: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in verschiedenen Versionen von Microsoft Windows und Microsoft Windows Server ausnutzen, um Administratorrechte zu erlangen, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren und offenzulegen oder Spoofing-Angriffe durchzuführen.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0728Multiples vulnérabilités dans Microsoft Windows

é Microsoft Windows CVE-2026-47652 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-47653 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-47654 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-47656 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-48563 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-48565 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-48566 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-48568 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-48570 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-48573 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-48574 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-48575 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-48576 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-48578 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-48583 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-49160 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-50507 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-50508 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-8863 du 09 juin 2026 Une

Official advisory
NCSC-NL · Dutch · NCSC-2026-0181Kwetsbaarheden verholpen in Microsoft Windows

A vulnerability in Windows Secure Boot allows a local authorized attacker to bypass its security mechanism, compromising the integrity of the boot process.

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
10.0.14393.0 < 10.0.14393.9234; 10.0.17763.0 < 10.0.17763.8880; 10.0.19044.0 < 10.0.19044.7417; 10.0.19045.0 < 10.0.19045.7417; 10.0.22631.0 < 10.0.22631.7219; 10.0.26100.0 < 10.0.26100.8655; 10.0.26200.0 < 10.0.26200.8655
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 9 Jun 2026 · Last source change 25 Aug 2026, 22:43 UTC · CWE-1329 · Reliance on Component That is Not Updateable

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-35523
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceOther authority
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2026-35523↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-48573 · cve.blacktree.nl