Vulnerability · Published Aug 28, 2026 · Assigned by microsoft
CVE-2026-66798Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Medium 4.3
In plain English
A medium-severity use-after-free 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 0.8% (higher than 56% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.8%top 43.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Edge (Chromium-based) | 1.0.0.0 – before 152.0.4191.53 |
| Microsoft | Microsoft Edge for Android | 1.0.0.0 – before 152.0.4191.52 |
| Microsoft | Microsoft Edge for iOS | 1.0.0.0 – before 152.0.4191.52 |
| Microsoft | Microsoft Edge for Linux | 1.0.0 – before 152.0.4191.52 |
| Microsoft | Microsoft Edge for MAC | 1.0.0.0 – before 152.0.4191.52 |
| Microsoft | Microsoft Edge for Windows | 1.0.0.0 – before 152.0.4191.52 |
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C
References
- Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability vendor-advisory, patch