EUVD-2026-52522
GHSA-pfc9-39px-jq86
Severity by source
Sources disagree (Medium–Critical)AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Network-delivered web content with low complexity and no privileges but required user interaction; browser-engine type confusion enables sandbox-escaping RCE, so scope changes and C/I/A are all High.
vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Lifecycle Timeline
6DescriptionNVD
Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Microsoft Edge (Chromium-based) before 151.0.4129.59 allows a network attacker to run arbitrary code by exploiting a type-confusion condition (CWE-843) when a victim is lured to malicious web content. Because the CVSS scope is Changed (S:C), successful exploitation can escape the affected component and impact the broader system, making this a high-severity browser flaw. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to actively load attacker-controlled web content in an unpatched Microsoft Edge (Chromium-based) instance below 151.0.4129.59 - the CVSS UI:R flag means user interaction (visiting a malicious or compromised page, or opening malicious content) is mandatory, which is the primary limiting factor. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H, 9.6) indicates a network-reachable, low-complexity, unauthenticated flaw requiring only that a user visit malicious content, with a scope change and total confidentiality/integrity/availability impact. … 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 | Vendor-released patch: update Microsoft Edge (Chromium-based) to version 151.0.4129.59 or later, which the input confirms as the first fixed build; consult the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66321 for the exact channel builds. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Microsoft Edge installations across the organization and deploy emergency notification to administrators and end-users requiring immediate update to version 151.0.4129.59 or later; enable forced updates on managed devices. …
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Security-feature bypass in Microsoft Edge (Chromium-based) versions prior to 150.0.4078.48 lets a remote, unauthenticate
Remote code execution via buffer over-read in Microsoft Edge (Chromium-based) versions prior to 151.0.4129.59 affects au
Remote code execution in Microsoft Edge (Chromium-based) prior to version 151.0.4129.59 is achievable by an unauthentica
Remote code execution in Microsoft Edge (Chromium-based) stems from a use-after-free memory corruption flaw (CWE-416) th
Remote code execution in Microsoft Edge (Chromium-based) allows an unauthenticated attacker to run arbitrary code by lur
Remote code execution in Microsoft Edge (Chromium-based) stems from a heap-based buffer overflow (CWE-122) that a networ
Remote code execution in Microsoft Edge (Chromium-based) before version 150.0.4078.48 allows an unauthenticated remote a
Remote code execution in Microsoft Edge (Chromium-based) is enabled by a type confusion vulnerability (CWE-843) that can
Remote code execution in Microsoft Edge (Chromium-based) stems from a use-after-free (CWE-416) memory-corruption flaw th
Remote code execution in Microsoft Edge (Chromium-based) lets an unauthenticated network attacker run arbitrary code by
Remote code execution in Microsoft Edge (Chromium-based) before 150.0.4078.48 allows an unauthenticated attacker to run
Privilege elevation in Microsoft Edge (Chromium-based) lets a network attacker escalate privileges by luring a victim in
Same technique Authentication Bypass
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External POC / Exploit Code
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