CERT-FR warns of multiple Microsoft Edge vulnerabilities enabling remote code execution (CERTFR-2026-AVI-1395)
CERT-FR published advisory CERTFR-2026-AVI-1395 on 27 October 2026 covering a large batch of vulnerabilities in Microsoft Edge. According to the advisory, some of them allow an attacker to achieve remote arbitrary code execution, privilege escalation and a breach of data confidentiality, and to bypass the security policy. The affected builds are Edge 155.x before 155.0.4283.62 and Edge versions before 154.0.4258.62. The advisory references more than 100 Microsoft bulletins dated 16 and 26 October 2026. It does not report active exploitation and gives no CVSS scores or IOCs.
Entenda a falha
A vulnerabilidade
CERT-FR advisory CERTFR-2026-AVI-1395 covers a large batch of Microsoft Edge vulnerabilities, with more than 100 CVEs, from CVE-2026-83831 and CVE-2026-85898 to the CVE-2026-102299 and CVE-2026-106xxx/110xxx ranges. The advisory says some of them allow remote arbitrary code execution, privilege escalation, a breach of data confidentiality and a security policy bypass. It gives no per-CVE severity, CVSS score or attack vector, and the vendor describes the exploitation prerequisites as unspecified. Affected: Edge 155.x before 155.0.4283.62 and Edge before 154.0.4258.62. Fixed: 155.0.4283.62 or later, or 154.0.4258.62 or later.
Como funciona
The advisory does not describe how any of these flaws work. It gives no per-CVE detail on what input reaches which component of Edge, or at which step processing fails. Details, if any, are in the individual Microsoft bulletins that CERT-FR references, which are not reproduced in the material available here.
Por que é vulnerável
The root causes are not stated. The advisory gives no per-CVE root cause, and the articles do not say why the flaws went unnoticed. The fix is delivered through the updated Edge builds listed in the Microsoft bulletins, and the advisory does not describe what the fixes change.
Como foi descoberta
The articles do not say who found the flaws or how. Microsoft published two CVEs (CVE-2026-83831 and CVE-2026-85898) on 16 October 2026 and the rest on 26 October 2026. CERT-FR then consolidated them in advisory CERTFR-2026-AVI-1395 on 27 October 2026. The advisory does not report active exploitation.
Explicação gerada por IA a partir da matéria e dos artigos, em 28/10/2026 14:25.
Detalhes técnicos
- Impacts listed: remote arbitrary code execution, privilege escalation, confidentiality breach, security policy bypass.
- Affected: Microsoft Edge 155.x earlier than 155.0.4283.62 and versions earlier than 154.0.4258.62.
- Two CVEs (CVE-2026-83831, CVE-2026-85898) were published by Microsoft on 16 October 2026. The rest were published on 26 October 2026.
- The advisory gives no per-CVE root cause, attack vector or severity. The vendor describes the exploitation prerequisites as unspecified.
Remediação
- Consult the Microsoft security bulletins for the fixes, as CERT-FR directs.
- Update Microsoft Edge to 155.0.4283.62 or later, or to 154.0.4258.62 or later.
Linha do tempo
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CERT-FR warns of multiple Microsoft Edge vulnerabilities enabling remote code execution (CERTFR-2026-AVI-1395)
ler a análise desta fonte ocultar
CERT-FR published advisory CERTFR-2026-AVI-1395 on 27 October 2026 covering a large batch of vulnerabilities in Microsoft Edge. According to the advisory, some of them allow an attacker to achieve remote arbitrary code execution, privilege escalation and a breach of data confidentiality, and to bypass the security policy. The affected builds are Edge 155.x before 155.0.4283.62 and Edge versions before 154.0.4258.62. The advisory references more than 100 Microsoft bulletins dated 16 and 26 October 2026. It does not report active exploitation and gives no CVSS scores or IOCs.
Technical Details
- Impacts listed: remote arbitrary code execution, privilege escalation, confidentiality breach, security policy bypass.
- Affected: Microsoft Edge 155.x earlier than 155.0.4283.62 and versions earlier than 154.0.4258.62.
- Two CVEs (CVE-2026-83831, CVE-2026-85898) were published by Microsoft on 16 October 2026. The rest were published on 26 October 2026.
- The advisory gives no per-CVE root cause, attack vector or severity. The vendor describes the exploitation prerequisites as unspecified.
Remediation
- Consult the Microsoft security bulletins for the fixes, as CERT-FR directs.
- Update Microsoft Edge to 155.0.4283.62 or later, or to 154.0.4258.62 or later.