CVE-2026-20079
Registro da vulnerabilidade com dados oficiais do NIST NVD, CISA KEV e FIRST EPSS.
Descrição
A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to bypass authentication and execute script files on an affected device to obtain root access to the underlying operating system. This vulnerability is due to an improper system process that is created at boot time. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute a variety of scripts and commands that allow root access to the device.
- CVSS 3.x
- 10 CRITICAL
- Publicada
- 04/03/2026
- Atualizada
- 16/09/2026
- Status NVD
- Analyzed
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Fraqueza: CWE-288
Exploração
- No catálogo CISA KEV
- Sim, desde 09/09/2026
- Usada por ransomware
- Não confirmado
- Prazo CISA
- 12/09/2026
- EPSS (FIRST)
- 88.2%
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Referências
Links publicados no registro oficial
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-onprem-fmc-authbypass-5JPp45V2
- http://seclists.org/fulldisclosure/2026/Aug/80
- https://blog.talosintelligence.com/fmc-ongoing-exploitation/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20079
Alguns navegadores bloqueiam sites oficiais abertos a partir da pré-visualização; copie o endereço para abrir em outra aba: https://nvd.nist.gov/vuln/detail/CVE-2026-20079