CERT-FR Flags Multiple Microsoft Edge Flaws
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CERT-FR advisory lists numerous vulnerabilities in Microsoft Edge versions before 155.0.4283.62 and 154.0.4258.62, including RCE and privilege escalation risks.
CERT-FR published an advisory consolidating a large batch of Microsoft Edge vulnerabilities disclosed via Microsoft Security Response Center (MSRC) bulletins dated 16 and 26 October 2026. The advisory covers Microsoft Edge versions 155.x prior to 155.0.4283.62 and versions prior to 154.0.4258.62. Collectively, the vulnerabilities could allow an attacker to achieve remote code execution, privilege escalation, security policy bypass, and disclosure of confidential information. No specific exploitation in the wild is mentioned in this advisory, and no technical details of individual flaws are provided beyond the risk categories.
Defenders should prioritize updating affected Microsoft Edge installations to the fixed versions referenced in the advisory (155.0.4283.62 or later, 154.0.4258.62 or later) as per Microsoft's official guidance. Given the volume of CVEs bundled into a single routine patch cycle and the absence of confirmed in-the-wild exploitation, this is treated as a standard browser patch advisory requiring timely but non-emergency remediation across the affected fleet.
Mentioned in this report
Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1395
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