CERT-FR Flags Microsoft Edge Patch Bundle
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CERT-FR advises patching over 100 vulnerabilities in Microsoft Edge versions before 154.0.4258.37, impact unspecified by vendor.
CERT-FR has published an advisory covering a large batch of vulnerabilities affecting Microsoft Edge versions prior to 154.0.4258.37. The advisory aggregates over one hundred CVEs disclosed by Microsoft on 25 September 2026, each referenced via the Microsoft Security Response Center (MSRC) update guide and the CVE.org database. The bulletin does not specify the nature of the security impact (e.g., remote code execution, privilege escalation, information disclosure) for these CVEs, as this detail was not specified by the vendor in the source material reviewed by CERT-FR.
No information is provided regarding active exploitation in the wild, proof-of-concept availability, or specific attack vectors. Defenders should treat this as a standard browser patch cycle requiring prompt update deployment. The recommended mitigation is straightforward: update all Microsoft Edge installations to version 154.0.4258.37 or later via standard patch management channels, referencing the individual MSRC bulletins for any CVE-specific technical details as they become available from the vendor.
Given the lack of severity specifics, exploitation status, or technical details in this advisory, this should be prioritized according to standard patch management SLAs for browser software rather than treated as an emergency. Organizations should ensure Edge auto-update mechanisms are functioning or push the update through enterprise software management tools.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1267
What this brief leaves out
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