최우선 대응긴급CISA KEV · 실제 악용 확인
CVE-2026-20127
Cisco Catalyst SD-WAN Controller and Manager Authentication Bypass Vulnerability
- 대응 우선순위
- 최우선
- CVSS
- 10
- EPSS
- 57.8% 백분위 99.0% · 2026.07.17 기준
- CISA KEV
- 등록
- 조치 기한
- 2026.02.27
- 공개일
- 2026.02.26
최우선 대응 판단
CISA KEV에 등록된 실제 악용 확인 취약점
실제 악용확인
EPSS57.8%
EPSS 백분위99.0%
설명
A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system. This vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could...
영향 제품·버전
제품 Cisco Catalyst SD-WAN Controller and Manager
영향 버전 Cisco Catalyst SD-WAN Controller and Manager 20.1.12, 19.2.1, 18.4.4, 18.4.5, 20.1.1.1, 20.1.1, 19.3.0, 19.2.2, 19.2.099, 18.3.6, 18.3.7, 19.2.0, 18.3.8, 19.0.0, 19.1.0, 18.4.302, 18.4.303, 19.2.097, 19.2.098, 17.2.10
수정 버전 Cisco Catalyst SD-WAN Controller and Manager 20.9.8.2, 20.12.5.3, 20.15.4.2, 20.18.2.1
취약점 확인 및 조치방법
영향 여부, 우선 대응, 정식 해결과 결과 확인 절차를 요약합니다.
CISA 공식 요구조치
Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.
조치 기한: 2026.02.27Cisco Catalyst SD-WAN Controller and Manager의 현재 전체 버전이 공식 영향 범위(Cisco Catalyst SD-WAN Controller and Manager 20.1.12, 19.2.1, 18.4.4, 18.4.5, 20.1.1.1, 20.1.1, 19.3.0, 19.2.2, 19.2.099, 18.3.6, 18.3.7, 19.2.0, 18.3.8, 19.0.0, 19.1.0, 18.4.302, 18.4.303, 19.2.097, 19.2.098, 17.2.10)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.
패치 후 같은 명령으로 전체 버전을 다시 확인해 Cisco Catalyst SD-WAN Controller and Manager 20.9.8.2, 20.12.5.3, 20.15.4.2, 20.18.2.1 기준을 충족하는지 확인합니다. 이어서 인증 우회 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
확인·조치·완료 확인제품·버전·노출 여부 확인부터 즉시 완화, 공식 조치와 완료 검증까지 실무 순서로 표시합니다.
취약점 확인 및 조치방법 보기 →기술 정보
CVSS 벡터 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE CWE-287
KEV 등록일 2026.02.25
랜섬웨어 캠페인 사용 미확인
CISA 비고 CISA Mitigation Instructions: https://www.cisa.gov/news-events/directives/ed-26-03-mitigate-vulnerabilities-cisco-sd-wan-systems ; https://www.cisa.gov/news-events/directives/supplemental-direction-ed-26-03-hunt-and-hardening-guidance-cisco-sd-wan-systems ; https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk ; https://nvd.nist.gov/vuln/detail/CVE-2026-20127
EPSS 데이터 기준일 2026.07.17