최우선 대응긴급CISA KEV · 실제 악용 확인

CVE-2026-48558

SimpleHelp SimpleHelp 취약점

대응 우선순위: 최우선
CVSS: 9.5
EPSS: -
CISA KEV: 등록
조치 기한: 2026.07.02
공개일: 2026.06.13

최우선 대응 판단

CISA KEV에 등록된 실제 악용 확인 취약점

실제 악용확인

EPSS-

EPSS 백분위-

설명

SimpleHelp versions 5.5.15 and prior and 6.0 pre-release versions contain an authentication bypass vulnerability in the OIDC authentication flow. When OIDC authentication is configured, identity tokens submitted during login are accepted without verifying their cryptographic signature. In a vulnerable configuration, a remote, unauthenticated attacker can submit a forged token containing arbitrary identity claims to obtain a fully authenticated technician session. In some configurations, this may also allow bypass of multi-factor authentication. No user interaction is required.

영향 제품·버전

공급사 SimpleHelp

제품 SimpleHelp

영향 버전 5.5.0, 6.0

수정 버전 공식 출처에서 확인 필요

조치 방법

CISA 공식 요구조치

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.

조치 기한: 2026.07.02

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:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CWE CWE-347

KEV 등록일 2026.06.29

랜섬웨어 캠페인 사용 미확인

CISA 비고 https://simple-help.com/security/simplehelp-security-update-2026-05 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-48558

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