CVE-2026-57021MEDIUM· 5.3MITRENVD대응게시일: 2026. 07. 09.수정일: 2026. 07. 13.CNA: sirt@juniper.netAnalyzed

An Out-of-bounds Write vulnerability in the http-gatekeeper (http-gk) of Juniper Networks Junos OS on SRX Series allows an unauthenticated,

Memory-Corruption

위협 신호 · CVSS · EPSS · KEV

정기 패치· 높은 악용 신호 없음

CVSS

5.3medium

이론적 심각도 점수

EPSS

0.3%상위 73.9%

30일 내 악용 확률 예측

KEV

미등재

실측 악용 기록 없음

권장 대응 기한14일 이내CISA SSVC 기준

2주 이내 패치 — 우선 조치 대상

자동화 가능외부 노출· KEV 미등재 · 자동화 가능 · 부분 영향 · 외부 노출

CVSS 벡터 · 메트릭

악용 경로

공격 벡터네트워크

공격 복잡도낮음

필요 권한불필요

사용자 상호작용불필요

범위불변

영향

기밀성 영향없음

무결성 영향없음

가용성 영향낮음

버전별 점수

CVSS 4.06.9MEDIUM· 악용성숙도 NOT_DEFINED

CVSS 3.15.3MEDIUM· 악용성 3.9· 영향도 1.4

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

약점 (CWE)

CWE-787
경계 밖 쓰기 — 버퍼 범위를 벗어난 메모리에 써서 충돌·코드 실행으로 이어질 수 있음.

상세 설명

An Out-of-bounds Write vulnerability in the http-gatekeeper (http-gk) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).

If an SRX Series device is configured for remote-access VPN with pre-logon compliance check, a network-based attacker sending specifically formatted requests can trigger an out of bounds write leading to an http-gk process crash. This crash leads to unavailability of all services depending on the [ system services web-management ] configuration (like J-Web, remote access VPN and firewall authentication) until the process automatically restarts.

This issue affects Junos OS on SRX Series:

23.2 versions before 23.2R2-S7,
23.4 versions before 23.4R2-S8,
24.2 versions before 24.2R2-S4,
24.4 versions before 24.4R2-S4,
25.2 versions before 25.2R2,
25.4 versions before 25.4R1-S1, 25.4R2.

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

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영향받는 구성 (CPE) 60

juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:-:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r1:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r1-s1:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r1-s2:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s1:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s2:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s3:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s4:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s5:*:*:*:*:*:*
juniper junos 23.2cpe:2.3:o:juniper:junos:23.2:r2-s6:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:-:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r1:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r1-s1:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r1-s2:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s1:*:*:*:*:*:*
juniper junos 23.4cpe:2.3:o:juniper:junos:23.4:r2-s2:*:*:*:*:*:*
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juniper junos 24.2cpe:2.3:o:juniper:junos:24.2:-:*:*:*:*:*:*
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juniper junos 24.4cpe:2.3:o:juniper:junos:24.4:r2:*:*:*:*:*:*
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juniper junos 25.2cpe:2.3:o:juniper:junos:25.2:-:*:*:*:*:*:*
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juniper junos 25.4cpe:2.3:o:juniper:junos:25.4:-:*:*:*:*:*:*
juniper junos 25.4cpe:2.3:o:juniper:junos:25.4:r1:*:*:*:*:*:*
juniper srx1500cpe:2.3:h:juniper:srx1500:-:*:*:*:*:*:*:*
juniper srx1600cpe:2.3:h:juniper:srx1600:-:*:*:*:*:*:*:*
juniper srx2300cpe:2.3:h:juniper:srx2300:-:*:*:*:*:*:*:*
juniper srx300cpe:2.3:h:juniper:srx300:-:*:*:*:*:*:*:*
juniper srx320cpe:2.3:h:juniper:srx320:-:*:*:*:*:*:*:*
juniper srx340cpe:2.3:h:juniper:srx340:-:*:*:*:*:*:*:*
juniper srx345cpe:2.3:h:juniper:srx345:-:*:*:*:*:*:*:*
juniper srx380cpe:2.3:h:juniper:srx380:-:*:*:*:*:*:*:*
juniper srx400cpe:2.3:h:juniper:srx400:-:*:*:*:*:*:*:*
juniper srx4100cpe:2.3:h:juniper:srx4100:-:*:*:*:*:*:*:*
juniper srx4120cpe:2.3:h:juniper:srx4120:-:*:*:*:*:*:*:*
juniper srx4200cpe:2.3:h:juniper:srx4200:-:*:*:*:*:*:*:*
juniper srx4300cpe:2.3:h:juniper:srx4300:-:*:*:*:*:*:*:*
juniper srx440cpe:2.3:h:juniper:srx440:-:*:*:*:*:*:*:*
juniper srx4600cpe:2.3:h:juniper:srx4600:-:*:*:*:*:*:*:*

참고 자료 1

https://supportportal.juniper.net/JSA110081
Vendor Advisory

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