최우선 대응긴급CISA KEV · 실제 악용 확인

CVE-2026-20253

Splunk Enterprise Missing Authentication for Critical Function Vulnerability

대응 우선순위: 최우선
CVSS: 9.8
EPSS: 88.2%
CISA KEV: 등록
조치 기한: 2026.06.21
공개일: 2026.06.11

최우선 대응 판단

CISA KEV에 등록된 실제 악용 확인 취약점

실제 악용확인

EPSS88.2%

EPSS 백분위99.7%

설명

In Splunk Enterprise 10.2 versions below 10.2.4 and 10 versions below 10.0.7, an unauthenticated user could create or truncate arbitrary files through a PostgreSQL sidecar service endpoint. The vulnerability exists because the PostgreSQL sidecar service endpoint lacks authentication controls, allowing any network-reachable user to invoke file operations without credentials. Splunk Enterprise versions 9.4 and earlier are not affected. If you cannot immediately upgrade to a fixed version, you can mitigate this vulnerability by disabling the PostgreSQL sidecar service.

영향 제품·버전

공급사 Splunk

제품 Enterprise

영향 버전 10.2, 10.0, >= 10.0.0 < 10.0.7, >= 10.2.0 < 10.2.4

수정 버전 10.0.7, 10.2.4

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: 2026.06.21

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:U/C:H/I:H/A:H

CWE CWE-306

KEV 등록일 2026.06.18

랜섬웨어 캠페인 사용 미확인

CISA 비고 https://advisory.splunk.com/advisories/SVD-2026-0603 ; 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-2026-20253

EPSS 데이터 기준일 2026.06.27

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