CVE-2026-20316
CISA 기관 조치 기한: 2026-08-01
Cisco Secure Firewall Management Center (FMC)
Qualys 위협 인텔 · 심각도 3/5 · QID 317862 · Cisco
공개 익스플로잇
실제 공격 관측
쉬운 악용
악성코드 연계
랜섬웨어 연계
CISA KEV
A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to log in to an affected device using a low-privileged account to access sensitive data within the impacted systems.
This vulnerability is due to the presence of static user credentials for a low-privileged account. An attacker could exploit this vulnerability by using the account to log in to an affected system. A successful exploit could allow the attacker to log in to the affected system and access sensitive data as the low-privileged user.
Note: If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.
Cisco has assigned this security advisory a Security Impact Rating (SIR) of High rather than Medium as the score indicates. The reason is that this vulnerability can be used with other Cisco Secure FMC Software vulnerabilities to elevate privileges.
This vulnerability is due to the presence of static user credentials for a low-privileged account. An attacker could exploit this vulnerability by using the account to log in to an affected system. A successful exploit could allow the attacker to log in to the affected system and access sensitive data as the low-privileged user.
Note: If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.
Cisco has assigned this security advisory a Security Impact Rating (SIR) of High rather than Medium as the score indicates. The reason is that this vulnerability can be used with other Cisco Secure FMC Software vulnerabilities to elevate privileges.
KEV 필수 조치: 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.
타임라인
- NVD 공개
- CISA KEV 등재(실제 악용 확인) 공개 당일
- CISA 기관 조치 기한 경과
- 첫 보도 BleepingComputer · 시스코, 공격에 악용된 CVE-2026-20079 Secure FMC 취약점 확인
- 최근 보도 (총 7건) 안랩 ASEC · 2026년 3분기 공격기법 동향보고서
날짜 정보 없는 신호: 랜섬웨어 캠페인 악용 실제 공격 관측
벡터: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N