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CVE-2026-21919— Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 安全漏洞

CVSS 6.5 · Medium EPSS 0.05% · P17

可能的 ATT&CK 技术 1AI

T1499 · Endpoint Denial of Service
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一、 漏洞 CVE-2026-21919 基础信息

漏洞信息
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Vulnerability Title
Junos OS and Junos OS Evolved: A high frequency of connecting and disconnecting NETCONF sessions causes management unavailability
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
An Incorrect Synchronization vulnerability in the management daemon (mgd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based attacker with low privileges to cause a complete Denial-of-Service (DoS) of the management plane. When NETCONF sessions are quickly established and disconnected, a locking issue causes mgd processes to hang in an unusable state. When the maximum number of mgd processes has been reached, no new logins are possible. This leads to the inability to manage the device and requires a power-cycle to recover. This issue can be monitored by checking for mgd processes in lockf state in the output of 'show system processes extensive': user@host> show system processes extensive | match mgd <pid> root       20   0 501M 4640K lockf   1 0:01 0.00% mgd If the system still can be accessed (either via the CLI or as root, which might still be possible as last resort as this won't invoke mgd), mgd processes in this state can be killed with 'request system process terminate <PID>' from the CLI or with 'kill -9 <PID>' from the shell.  This issue affects: Junos OS: * 23.4 versions before 23.4R2-S4, * 24.2 versions before 24.2R2-S1, * 24.4 versions before 24.4R1-S3, 24.4R2; This issue does not affect Junos OS versions before 23.4R1; Junos OS Evolved: * 23.4 versions before 23.4R2-S5-EVO, * 24.2 versions before 24.2R2-S1-EVO, * 24.4 versions before 24.4R1-S3-EVO, 24.4R2-EVO. This issue does not affect Junos OS Evolved versions before 23.4R1-EVO;
来源: 美国国家漏洞数据库 NVD
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
不正确的同步机制
来源: 美国国家漏洞数据库 NVD
Vulnerability Title
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved都是美国瞻博网络（Juniper Networks）公司的产品。Juniper Networks Junos OS是一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。Juniper Networks Junos OS Evolved是Junos OS 的升级版系统。 Juniper Networks Junos OS和Juniper Network
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商产品影响版本CPE订阅
Juniper NetworksJunos OS 23.4 ~ 23.4R2-S4 -
Juniper NetworksJunos OS Evolved 23.4 ~ 23.4R2-S5-EVO -

二、漏洞 CVE-2026-21919 的公开POC

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三、漏洞 CVE-2026-21919 的情报信息

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CVE-2026-21919 厂商安全公告 (1)

同批安全公告 · Juniper Networks · 2026-04-09 · 共 26 条

CVE-2026-337849.8 CRITICALJuniper Networks Support Insights Virtual Lightweight Collector 安全漏洞
CVE-2026-337858.8 HIGHJuniper Networks Junos OS MX 安全漏洞
CVE-2025-139148.7 HIGHJuniper Networks Apstra 安全漏洞
CVE-2026-337937.8 HIGHJuniper Networks Junos OS和Juniper Networks Junos OS Evolved 安全漏洞
CVE-2026-337887.8 HIGHJuniper Networks Junos OS Evolved 访问控制错误漏洞
CVE-2026-337907.5 HIGHJuniper Networks Junos OS SRX 代码问题漏洞
CVE-2026-337787.5 HIGHJuniper Networks Junos OS SRX和Juniper Networks Junos OS MX 安全漏洞
CVE-2026-337717.4 HIGHJuniper Networks CTP OS 安全漏洞
CVE-2026-337977.4 HIGHJuniper Networks Junos OS和Juniper Networks Junos OS Evolved 输入验证错误漏洞
CVE-2026-219167.3 HIGHJuniper Networks Junos OS 安全漏洞
CVE-2026-337916.7 MEDIUMJuniper Networks Junos OS和Juniper Networks Junos OS Evolved 操作系统命令注入漏洞
CVE-2026-219156.7 MEDIUMJuniper Networks Support Insights Virtual Lightweight Collector 安全漏洞
CVE-2026-337806.5 MEDIUMJuniper Networks Junos OS和Juniper Networks Junos OS Evolved 安全漏洞
CVE-2025-599696.5 MEDIUMJuniper Networks Junos OS Evolved 安全漏洞
CVE-2026-337816.5 MEDIUMJuniper Networks Junos OS EX/QFX 代码问题漏洞
CVE-2026-337826.5 MEDIUMJuniper Networks Junos OS MX 安全漏洞
CVE-2026-337756.5 MEDIUMJuniper Networks Junos OS 安全漏洞
CVE-2026-337796.5 MEDIUMJuniper Networks Junos OS 安全漏洞
CVE-2026-337836.5 MEDIUMJuniper Networks Junos OS Evolved 安全漏洞
CVE-2026-337746.5 MEDIUMJuniper Networks Junos OS MX 代码问题漏洞

显示前 20 条，共 26 条。 查看全部 &rarr; →

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-821

V. Comments for CVE-2026-21919

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