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CVE-2026-20182CRITICAL· 10.0MITRENVD대응게시일: 2026. 05. 14.수정일: 2026. 06. 17.CNA: psirt@cisco.comAnalyzed

May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the was d

Auth

위협 신호 · CVSS · EPSS · KEV

즉시 패치· 실측 악용 확인 · KEV 등재
CVSS
10.0critical

이론적 심각도 점수

EPSS
90.3%상위 0.2%

30일 내 악용 확률 예측

KEV
등재됨

등재일 2026. 05. 14.

패치 기한 2026. 05. 17.

권장 대응 기한3일 이내+ 침해 포렌식CISA SSVC 기준

즉시 패치 + 침해 여부 포렌식 분석

KEV 악용자동화 가능완전 장악외부 노출· KEV 등재 · 자동화 가능 · 완전 장악 · 외부 노출

CVSS 벡터 · 메트릭

악용 경로
공격 벡터네트워크
공격 복잡도낮음
필요 권한불필요
사용자 상호작용불필요
범위변경
영향
기밀성 영향높음
무결성 영향높음
가용성 영향높음
버전별 점수
CVSS 3.110.0CRITICAL· 악용성 3.9· 영향도 6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

약점 (CWE)

  • CWE-287

    부적절한 인증 — 인증 절차가 미흡해 신원 위장이 가능.

상세 설명

May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The section of this advisory includes Show Control Connections guidance to help with system checks. 

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 the affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric.

AI 심층 분석

공격 시나리오 · 재현 가능한 PoC 페이로드 · 즉시 적용 가능한 차단 패치를 한 번에 받아 보세요. 보안 운영팀이 그대로 점검·티켓팅에 쓸 수 있는 형태로 정리해 드립니다.

영향받는 제품·버전

  • cisco catalyst_sd-wan_manager< 20.9.9.1
    other
  • cisco catalyst_sd-wan_manager20.10 - 20.12.5.4
    other
  • cisco catalyst_sd-wan_manager20.12.6 - 20.12.6.2
    other
  • cisco catalyst_sd-wan_manager20.13 - 20.15.4.4
    other
  • cisco catalyst_sd-wan_manager20.15.5 - 20.15.5.2
    other
  • cisco catalyst_sd-wan_manager20.16 - 20.18.2.2
    other
  • cisco catalyst_sd-wan_manager26.1 - 26.1.1.1
    other
  • cisco catalyst_sd-wan_manager
    other
  • cisco sd-wan_vbond_orchestrator< 20.9.9.1
    other
  • cisco sd-wan_vbond_orchestrator20.10 - 20.12.5.4
    other
  • cisco sd-wan_vbond_orchestrator20.12.6 - 20.12.6.2
    other
  • cisco sd-wan_vbond_orchestrator20.13 - 20.15.4.4
    other
  • cisco sd-wan_vbond_orchestrator20.15.5 - 20.15.5.2
    other
  • cisco sd-wan_vbond_orchestrator20.16 - 20.18.2.2
    other
  • cisco sd-wan_vbond_orchestrator26.1 - 26.1.1.1
    other
  • cisco sd-wan_vbond_orchestrator
    other
  • cisco sd-wan_vsmart_controller< 20.9.9.1
    other
  • cisco sd-wan_vsmart_controller20.10 - 20.12.5.4
    other
  • cisco sd-wan_vsmart_controller20.12.6 - 20.12.6.2
    other
  • cisco sd-wan_vsmart_controller20.13 - 20.15.4.4
    other
  • cisco sd-wan_vsmart_controller20.15.5 - 20.15.5.2
    other
  • cisco sd-wan_vsmart_controller20.16 - 20.18.2.2
    other
  • cisco sd-wan_vsmart_controller26.1 - 26.1.1.1
    other
  • cisco sd-wan_vsmart_controller
    other

영향받는 구성 (CPE) 6

  • cisco catalyst_sd-wan_manager< 20.9.9.1cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
  • cisco catalyst_sd-wan_manager 20.12.7cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.12.7:*:*:*:*:*:*:*
  • cisco sd-wan_vbond_orchestrator< 20.9.9.1cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:*:*:*:*:*:*:*:*
  • cisco sd-wan_vbond_orchestrator 20.12.7cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:20.12.7:*:*:*:*:*:*:*
  • cisco sd-wan_vsmart_controller< 20.9.9.1cpe:2.3:a:cisco:sd-wan_vsmart_controller:*:*:*:*:*:*:*:*
  • cisco sd-wan_vsmart_controller 20.12.7cpe:2.3:a:cisco:sd-wan_vsmart_controller:20.12.7:*:*:*:*:*:*:*

참고 자료 3

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