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Multiple Vulnerabilities in Microsoft Edge Chromium-based Browser Announced

First seen 15 Sep 2026, 09:40 UTC • •
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ThreatCluster AI
ThreatCluster •September 15, 2026 at 11:23 UTC
  • •Multiple vulnerabilities in Microsoft Edge (Chromium-based) disclosed, including CVE-2026-77490.
  • •Vulnerabilities include spoofing and multiple 'use after free' issues, affecting user data confidentiality.
  • •Users are urged to update their browsers immediately to mitigate the risks.

A series of vulnerabilities affecting Microsoft Edge (Chromium-based) have been disclosed, including CVE-2026-77490, a spoofing vulnerability, and several 'use after free' vulnerabilities (CVE-2026-87460, CVE-2026-87578, CVE-2026-87609, CVE-2026-87542, CVE-2026-87502, CVE-2026-87514, CVE-2026-87512, CVE-2026-87628, CVE-2026-87533, CVE-2026-87526, CVE-2026-87556, CVE-2026-87449, CVE-2026-87507, CVE-2026-87540, CVE-2026-87441, CVE-2026-87457, CVE-2026-87468, CVE-2026-87549, CVE-2026-87560, CVE-2026-87593, CVE-2026-87548, CVE-2026-87569, CVE-2026-87451, CVE-2026-87495). These vulnerabilities could lead to unauthorized access and information leakage. The vulnerabilities were published between September 9 and September 15, 2026, with some requiring user interaction for exploitation. Microsoft has released updates to mitigate these vulnerabilities, and users are urged to update their browsers immediately.

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Timeline

2026-09-09
Multiple CVEs published
A series of vulnerabilities affecting Microsoft Edge were disclosed, including CVE-2026-87506 and CVE-2026-87475.
Api.Msrc.Microsoft
2026-09-09
CVE-2026-87506 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-09-09
CVE-2026-87475 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-09-09
CVE-2026-87496 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-09-09
CVE-2026-87478 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-09-09
CVE-2026-87502 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-09-09
CVE-2026-87436 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-09-09
CVE-2026-87638 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-09-09
CVE-2026-87588 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-09-09
CVE-2026-87533 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE

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