EUVD-2026-67847
GHSA-c7hh-86mm-w7m5
Severity by source
AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Description confirms information disclosure only; official I:L is not supported by the disclosure-only characterization, so I:N is independently assessed.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
2DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) allows an authorized attacker to disclose information over a network.
AnalysisAI
Copilot Chat in Microsoft Edge (Chromium-based) exposes a race condition that enables an authorized, low-privileged attacker to disclose information across a component scope boundary over the network. The flaw arises from improper synchronization of concurrent access to a shared resource within the Copilot Chat feature, producing partial confidentiality and, per the official CVSS vector, limited integrity exposure. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to be an authorized (authenticated) user of Microsoft Edge - the CVSS PR:L metric confirms low-privilege credentials are sufficient, but unauthenticated access is not an attack path. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 4.4 (Medium) with vector AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N encodes meaningful real-world constraints that substantially reduce actual exploitability. … 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 | A vendor-released patch is available per the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58616; the specific patched Edge version number is not independently confirmed from the data supplied, so administrators should apply the latest available Microsoft Edge update and cross-reference the fix version against the MSRC advisory directly. … Detailed patch versions, workarounds, and compensating controls in full report. |
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-362 – Race Condition
View allSame technique Information Disclosure
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External POC / Exploit Code
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