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CRITICAL

CVE-2025-55234

CVSS v3

9.8

CRITICAL

Score EPSS

20.1 %

probabilité d’exploitation au 2026-10-05

CISA KEV

Non

exploitation connue

Exploitation

—

statut SSVC

Description

SMB Server might be susceptible to relay attacks depending on the configuration. An attacker who successfully exploited these vulnerabilities could perform relay attacks and make the users subject to elevation of privilege attacks. The SMB Server already supports mechanisms for hardening against relay attacks: SMB Server signing SMB Server Extended Protection for Authentication (EPA) Microsoft is releasing this CVE to provide customers with audit capabilities to help them to assess their environment and to identify any potential device or software incompatibility issues before deploying SMB Server hardening measures that protect against relay attacks. If you have not already enabled SMB Server hardening measures, we advise customers to take the following actions to be protected from these relay attacks: Assess your environment by utilizing the audit capabilities that we are exposing in the September 2025 security updates. See Support for Audit Events to deploy SMB Server Hardening—SMB Server Signing & SMB Server EPA. Adopt appropriate SMB Server hardening measures.

Détails techniques

Publiée le
2025-09-09

Questions fréquentes

Qu’est-ce que CVE-2025-55234 ?

SMB Server might be susceptible to relay attacks depending on the configuration. An attacker who successfully exploited these vulnerabilities could perform relay attacks and make the users subject to elevation of privilege attacks. The SMB Server already supports mechanisms for hardening against relay attacks: SMB Server signing SMB Server Extended Protection for Authentication (EPA) Microsoft is releasing this CVE to provide customers with audit capabilities to help them to assess their environment and to identify any potential device or software incompatibility issues before deploying SMB Server hardening measures that protect against relay attacks. If you have not already enabled SMB Server hardening measures, we advise customers to take the following actions to be protected from these relay attacks: Assess your environment by utilizing the audit capabilities that we are exposing in the September 2025 security updates. See Support for Audit Events to deploy SMB Server Hardening—SMB Server Signing & SMB Server EPA. Adopt appropriate SMB Server hardening measures.

CVE-2025-55234 est-elle activement exploitée ?

Aucune exploitation active de CVE-2025-55234 n’est confirmée. Son score EPSS était de 20.1 % au 2026-10-05, soit la probabilité estimée d’exploitation dans les 30 prochains jours.

Quel est le score CVSS de CVE-2025-55234 ?

CVE-2025-55234 a un score de base CVSS v3 de 9.8 (gravité CRITICAL).

CVE-2025-55234 touche-t-elle votre environnement ?

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Autres vulnérabilités 2025 à trier

Classées par probabilité d’exploitation (EPSS).

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