RadioCSIRT English Edition – Your Cybersecurity News for Saturday, December 27, 2025 (Ep. 63)
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RadioCSIRT English Edition – Your Cybersecurity News for Saturday, December 27, 2025 (Ep. 63)
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Welcome to your daily cybersecurity podcast.
We open this edition with several security advisories published by CERT-FR regarding critical vulnerabilities affecting major components of the Linux ecosystem and enterprise environments. The bulletins notably concern Ubuntu, Red Hat, and IBM products, which are exposed to flaws that may allow privilege escalation, arbitrary code execution, or compromise of confidentiality. These vulnerabilities affect widely deployed components in server and cloud infrastructures, highlighting the need for rigorous patch management in critical environments.
We then analyze a vulnerability affecting the Roundcube webmail, referenced as CVE-2025-68461. This flaw allows a remote attacker to exploit input handling mechanisms in order to compromise session security or execute malicious code in the context of the targeted user. Given the widespread use of Roundcube in email infrastructures, this vulnerability represents a significant risk for Internet-exposed organizations.
Finally, we review a security vulnerability patched by Microsoft, identified as CVE-2025-13699. This flaw affects a Windows system component and may be exploited to bypass security mechanisms or gain elevated privileges. Microsoft has released fixes through its update guide and recommends prompt application to reduce the risk of active exploitation.
Sources
- CERT-FR – Ubuntu vulnerabilities: https://www.cert.ssi.gouv.fr/avis/CERTFR-2025-AVI-1139/
- CERT-FR – Red Hat vulnerabilities: https://www.cert.ssi.gouv.fr/avis/CERTFR-2025-AVI-1141/
- CERT-FR – IBM product vulnerabilities: https://www.cert.ssi.gouv.fr/avis/CERTFR-2025-AVI-1137/
- Roundcube vulnerability – CVE-2025-68461:https://cyberveille.esante.gouv.fr/alertes/roundcube-cve-2025-68461-2025-12-26
- Microsoft – CVE-2025-13699:https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-13699
Don’t think, patch!
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