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Microsoft Edge CVE-2026-62904

| EUVDEUVD-2026-67848 MEDIUM
Incorrect Authorization (CWE-863)
2026-08-28 microsoft GHSA-f65f-2957-5q66
5.4
CVSS 3.1 · NVD
Temporal: 4.7
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Severity by source

Vendor (microsoft) PRIMARY
MEDIUM
qualitative
NVD
5.4 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CIRCL (temporal)
4.7 MEDIUM
cvss
vuln.today AI
5.4 MEDIUM

Network-delivered, user-interaction-required browser authorization bypass with no attacker privilege needed; impact is limited to low confidentiality and integrity within the browser's unchanged scope.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

2
Analysis Generated
Aug 28, 2026 - 20:55 vuln.today
CVE Published
Aug 28, 2026 - 17:43 nvd
MEDIUM 5.4

DescriptionNVD

Incorrect authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

AnalysisAI

Incorrect authorization in Microsoft Edge (Chromium-based) allows a remote, unauthenticated attacker to disclose limited information and cause minor integrity impact by luring a user to attacker-controlled web content. The flaw stems from CWE-863, where Edge's authorization logic fails to correctly enforce access boundaries, permitting content-triggered data exposure within the browser's security context. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
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Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation User interaction is required - the target must actively visit or be redirected to attacker-controlled web content (UI:R per CVSS). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 5.4 Medium score reflects a realistic ceiling: impact is limited to low confidentiality and integrity (C:L/I:L/A:N) with no availability harm, and mandatory user interaction (UI:R) prevents fully automated, opportunistic mass exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Patch available per vendor advisory - update Microsoft Edge to the version specified in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62904. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-62904 vulnerability details – vuln.today

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