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Cisco Secures Its Secure Firewall Management Center from a Potentially Catastrophic Maximum-Severity Security Flaw



Cisco has issued a critical patch for its Secure Firewall Management Center Software to address a maximum-severity security flaw that could allow an unauthenticated, remote attacker to execute arbitrary code on vulnerable systems. The vulnerability affects FMC Software versions 7.0.7 and 7.7.0 with RADIUS authentication enabled.

  • Cisco has issued a critical security patch for its Secure Firewall Management Center (FMC) Software to address a maximum-severity security flaw.
  • The vulnerability affects FMC Software versions 7.0.7 and 7.7.0 with RADIUS authentication enabled, while ASA and FTD software are not impacted.
  • A patch update addresses the concern of an unauthenticated attacker sending crafted input to execute remote code on vulnerable systems.
  • No workaround is available, but switching to local, LDAP, or SAML Single Sign-On (SSO) authentication can mitigate the vulnerability.
  • Cisco has not identified any attacks in the wild exploiting this flaw yet, highlighting the need for ongoing vigilance.



  • Cisco has recently issued a critical security patch for its Secure Firewall Management Center (FMC) Software, effectively fortifying its systems against an unauthenticated and remote attacker that could potentially execute arbitrary code on vulnerable systems. This maximum-severity security flaw, identified as CVE-2025-20265 with a CVSS score of 10.0, stems from improper input handling during authentication in the RADIUS subsystem implementation of Cisco Secure Firewall Management Center (FMC) Software.

    The vulnerability affects two specific versions of FMC Software - version 7.0.7 and version 7.7.0 - that have RADIUS authentication enabled, while the ASA and FTD software are not impacted. The flaw was discovered by Brandon Sakai of Cisco during internal security testing. This critical patch update addresses a serious concern where an unauthenticated attacker could send crafted input when entering credentials to be authenticated at the configured RADIUS server, ultimately leading to remote code execution on vulnerable systems.

    A statement from Cisco highlights that there is no workaround for this vulnerability; however, it can be mitigated by switching to local, LDAP, or SAML Single Sign-On (SSO) authentication. This move will necessitate an assessment of its impact on the specific environment, highlighting the importance of swift and decisive action in safeguarding against potential security breaches.

    It is worth noting that the Cisco Product Security Incident Response Team (PSIRT) has not yet identified any attacks in the wild exploiting this flaw, despite the maximum-severity nature of the vulnerability. This information serves as a reminder of the ongoing vigilance required by organizations to protect themselves against emerging threats.

    The recent patch update from Cisco underscores the importance of staying informed about and keeping up-to-date with the latest security patches for all software systems. Furthermore, it highlights the crucial role that proactive security measures play in safeguarding against potential breaches and minimizing the risk of data loss or disruption.

    In conclusion, Cisco's prompt action to address this maximum-severity security flaw underscores its commitment to protecting its customers' networks from potential threats. As we navigate the complex and ever-evolving landscape of cybersecurity, it is imperative that organizations remain vigilant and proactive in addressing emerging vulnerabilities.


    Cisco has issued a critical patch for its Secure Firewall Management Center Software to address a maximum-severity security flaw that could allow an unauthenticated, remote attacker to execute arbitrary code on vulnerable systems. The vulnerability affects FMC Software versions 7.0.7 and 7.7.0 with RADIUS authentication enabled.




    Related Information:
  • https://www.ethicalhackingnews.com/articles/Cisco-Secures-Its-Secure-Firewall-Management-Center-from-a-Potentially-Catastrophic-Maximum-Severity-Security-Flaw-ehn.shtml

  • https://securityaffairs.com/181182/security/cisco-fixed-maximum-severity-security-flaw-in-secure-firewall-management-center.html

  • https://nvd.nist.gov/vuln/detail/CVE-2025-20265

  • https://www.cvedetails.com/cve/CVE-2025-20265/


  • Published: Fri Aug 15 04:18:03 2025 by llama3.2 3B Q4_K_M













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