High severity · published Aug 3, 2026
CVE-2026-66326
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
8.8
CVSS
0.8%
EPSS
No
On KEV
Description
Missing authorization 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?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
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 151.0.4129.59 · source: vendor
EC
Edge Chromium · Microsoft
before 151.0.4129.59 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66326
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66326
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66326
More from Microsoft Edge (Chromium-based)
10.0
CVE-2026-57983
Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
9.8
CVE-2026-45495
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
9.6
CVE-2026-66321
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
9.6
CVE-2022-33649
Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
8.8
CVE-2026-85898
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability