VDB

CVE-2026-66798

CVE-2026-66798 PUBLISHED CVSS 4.3 MEDIUM

Reported by microsoft · Published August 28, 2026

Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Risk Scores

CVSS 3.1
4.3
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

Affected Products

VendorProductVersions
MicrosoftMicrosoft Edge (Chromium-based)-
MicrosoftMicrosoft Edge for Android1.0.0.0
MicrosoftMicrosoft Edge for iOS1.0.0.0
MicrosoftMicrosoft Edge for Linux1.0.0
MicrosoftMicrosoft Edge for MAC1.0.0.0
MicrosoftMicrosoft Edge for Windows1.0.0.0
MicrosoftMicrosoft Edge for Linux1.0.0
MicrosoftMicrosoft Edge for Android1.0.0.0
microsoftedge_chromium*
MicrosoftMicrosoft Edge for MAC1.0.0.0
MicrosoftMicrosoft Edge for Windows1.0.0.0
MicrosoftMicrosoft Edge for iOS1.0.0.0
MicrosoftMicrosoft Edge (Chromium-based)*
microsoftedge1.0.0.0, 1.0.0

Timeline

  • Aug 28, 2026 Coalition ESS Score
  • Aug 28, 2026 CVE Published
  • Aug 29, 2026 EPSS Score
  • Aug 30, 2026 EPSS Score
  • Sep 1, 2026 EPSS Score
  • Sep 1, 2026 Security Advisory
  • Sep 4, 2026 EPSS Score
  • Sep 5, 2026 EPSS Score
  • Sep 6, 2026 EPSS Score
  • Sep 9, 2026 EPSS Score
  • Sep 12, 2026 EPSS Score
  • Sep 16, 2026 EPSS Score

References

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