High severity · published Oct 27, 2026
CVE-2026-83831
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
New
8.8
CVSS
–
EPSS
No
On KEV
Description
Double free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
Microsoft Edge (Chromium-based) · Microsoft
1.0.0.0 before 154.0.4258.48 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-83831
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-83831
msrc.microsoft.com
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83831
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