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%
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

공급사 Cisco

제품 Catalyst SD-WAN Controller and Manager

영향 버전 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 20.9.8.2, 20.12.5.3, 20.15.4.2, 20.18.2.1

조치 방법

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: 2026.02.27

공급사가 제공한 최신 보안 업데이트 적용
자사 보유 제품과 영향 버전의 일치 여부 확인
외부 노출 서비스와 비정상 인증·접속 로그 점검
패치가 어려우면 공급사 완화조치와 접근통제 적용

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 2026.06.27

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