Quick answers
- Is CVE-2026-66326 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-66326 being exploited in the wild.
- How severe is CVE-2026-66326?
- Medium severity, with a CVSS score of 6.5, published 4 August 2026.
- Which products and versions are affected?
- Microsoft Edge <UNKNOWN>.
- Is there a fix for CVE-2026-66326?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-66326 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-66326?
- Check whether you run Microsoft Edge or Microsoft Edge Chromium at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability stems from missing authorization checks in Microsoft Edge (Chromium-based). An attacker can exploit this flaw over the network to execute arbitrary code with the privileges of the affected user. No user interaction or pre-authentication is required to trigger the vulnerability. The attack vector is network-based, making it remotely exploitable. Microsoft has published a security update to remediate this issue.
Affected products
- Microsoft Edge <UNKNOWN>
Timeline
- 2026-08-04: disclosed