Quick answers
- Is CVE-2026-20942 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20942 being exploited in the wild.
- How severe is CVE-2026-20942?
- Medium severity, with a CVSS score of 4.3, published 29 October 2026.
- Which products and versions are affected?
- Microsoft Edge <UNKNOWN>.
- Is there a fix for CVE-2026-20942?
- 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-2026-20942 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-20942?
- Check whether you run Microsoft Edge 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 involves improper restriction of rendered UI layers or frames in the Chromium-based Microsoft Edge browser, allowing an unauthorized attacker to perform spoofing attacks over a network. An attacker can craft a malicious webpage that displays fake interface elements to deceive users. This is a client-side vulnerability requiring user interaction (visiting a malicious site) but no authentication.
Affected products
- Microsoft Edge <UNKNOWN>
Timeline
- 2026-10-29: disclosed