CERT-FR Advisory: Multiple Microsoft Edge Flaws
CERT-FR warns of numerous vulnerabilities in Microsoft Edge versions prior to 157.0.4341.42; exploitability and impact unspecified by Microsoft.
Sourcecert.cyber.gouv.fr — open the original
What to check
- Applies to
- The 40 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 issued an advisory consolidating a large number of vulnerabilities affecting Microsoft Edge, impacting all versions prior to 157.0.4341.42. The advisory does not specify the exact nature of the security impact for each CVE, stating only that successful exploitation could allow an attacker to cause an unspecified security issue. This is a standard CERT-FR bulletin aggregating Microsoft's own security advisories published via MSRC on 5 and 11 November 2026.
No information is provided regarding active exploitation in the wild, proof-of-concept availability, or specific attack vectors (e.g., remote code execution, information disclosure, spoofing) for the individual CVEs. Defenders should consult the referenced Microsoft Security Response Center (MSRC) bulletins for each CVE to determine the specific vulnerability class, affected components, and exploitability metrics (CVSS scores) for prioritization.
The remediation is straightforward: update Microsoft Edge to version 157.0.4341.42 or later. Given the lack of detail on exploitation status and the routine nature of browser patch cycles, this should be treated as a standard patch management action rather than an emergency response, pending further detail from Microsoft's own bulletins.
Mentioned in this report
Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1510
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