EUVD-2026-52533
GHSA-f74h-78gx-6g84
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Network-delivered browser flaw requiring user visit (UI:R); no authentication needed; high confidentiality from cross-origin data read; low integrity from spoofing; no availability impact.
Primary rating from Vendor (microsoft).
CVSS VectorNVD
Lifecycle Timeline
4DescriptionNVD
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
AnalysisAI
Origin validation error in Microsoft Edge (Chromium-based) enables a remote unauthenticated attacker to perform cross-origin spoofing attacks, achieving high confidentiality impact and limited integrity impact against victims who interact with attacker-controlled content. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N) with temporal indicators E:U/RL:O/RC:C indicates an officially patched vulnerability with no publicly proven exploit code and confirmed vendor reporting. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim is using Microsoft Edge (Chromium-based) in any version prior to the patched release and that the attacker can direct the victim to an attacker-controlled web page or resource (AV:N, UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 7.1 (High) is driven primarily by the High confidentiality impact, though real-world risk is partially bounded by the required user interaction (UI:R). … 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 | Apply the vendor-released patch via the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66322. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all Microsoft Edge deployments and verify patch distribution infrastructure is operational. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Security-feature bypass in Microsoft Edge (Chromium-based) versions prior to 150.0.4078.48 lets a remote, unauthenticate
Remote code execution in Microsoft Edge (Chromium-based) before 151.0.4129.59 allows a network attacker to run arbitrary
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) is enabled by a type confusion vulnerability (CWE-843) that can
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) 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
Same weakness CWE-346 – Origin Validation Error
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
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