CVE-2026-66312
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Buffer over-read in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Buffer over-read in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.
- Record
CVE-2026-66312- CVSS 3.1
- 6.5 Medium
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 - Weakness
- CWE-126
- Updated
- 2026-11-02
EUVDEUVD-2026-52524
Buffer over-read in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.
- Record
EUVD-2026-52524- CVSS 3.1
- 6.5 Medium
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-jxgm-6gw2-5xw5
Buffer over-read in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code...
Buffer over-read in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.
- Record
GHSA-jxgm-6gw2-5xw5- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-126
- Updated
- 2026-11-02
NVD
Buffer over-read in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.
- Record
CVE-2026-66312- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-126
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-66312 is a medium vulnerability (CVSS 6.5) in Microsoft Edge (chromium-based), published August 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.10%, the 65th percentile. No source names a fixed version.