Moderate CVSS 5.4 EPSS 0.0024 2026-05 archive

Executive Summary

Improper input validation in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security feature over a network.

Overview

5.4
CVSS MEDIUM
Moderate
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
Category Security Feature Bypass
Released May 12 2026
Last Updated May 12 2026
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.0024 — 0.14813 percentile
NVD CVSS 5.4 MEDIUM — differs from MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged

EPSS Score

0.0024
probability of exploitation in the next 30 days
0.14813 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

1 affected product
Product KB Article Severity Impact Restart Required
Microsoft Edge (Chromium-based) Release Notes (Security Update) Moderate Security Feature Bypass No

Patches

1 patch
Article Type Restart
Release Notes Security Update No

Known Exploits

Acknowledgments

Orange Tsai (@orange_8361) of DEVCORE Research Team (@d3vc0r3) working with TrendAI Zero Day Initiative, Anonymous