Vulnerability · Published Aug 3, 2026 · Assigned by microsoft
CVE-2026-66312Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Medium 6.5
In plain English
A medium-severity security flaw in Microsoft Edge (Chromium-based) from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)1.1%top 34.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Buffer over-read in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Edge (Chromium-based) | 1.0.0.0 – before 151.0.4129.59 |
Weakness: CWE-126 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
References
- Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability vendor-advisory, patch