CERT-FR flags multiple Microsoft Edge vulnerabilities
CERT-FR advisory lists numerous flaws in Microsoft Edge before version 156.0.4314.58, risking data confidentiality breaches; no exploitation reported.
Sourcecert.cyber.gouv.fr — open the original
What to check
- Applies to
- The 25 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
CERT-FR has published an advisory covering multiple vulnerabilities affecting Microsoft Edge versions prior to 156.0.4314.58. The advisory, sourced from Microsoft's own security bulletins published on 4 November 2026, enumerates over 20 distinct CVEs. The primary risks identified are a breach of data confidentiality and an additional issue whose nature was not specified by the editor (Microsoft).
No evidence of active exploitation is mentioned in the advisory. CERT-FR recommends that organizations consult Microsoft's security bulletins for each CVE and apply the corresponding patches to update Edge to version 156.0.4314.58 or later. This is a routine vendor-patch advisory rather than a report of observed attack activity; defenders should prioritize patching standard browser infrastructure in line with normal update cycles, verifying that all managed Edge installations are updated to the fixed version.
Mentioned in this report
Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1466
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