CVE-2026-21908— Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 资源管理错误漏洞
一分钟漏洞结论
影响对象
Juniper Networks Junos OS
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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
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一、 漏洞 CVE-2026-21908 基础信息
漏洞信息
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Vulnerability Title
Junos OS and Junos OS Evolved: Use after free vulnerability In 802.1X authentication daemon can cause crash of the dot1xd process
来源: CVE Program / CVE List V5
Vulnerability Description
A Use After Free vulnerability was identified in the 802.1X authentication daemon (dot1xd) of Juniper Networks Junos OS and Junos OS Evolved that could allow an authenticated, network-adjacent attacker flapping a port to crash the dot1xd process, leading to a Denial of Service (DoS), or potentially execute arbitrary code within the context of the process running as root.
The issue is specific to the processing of a change in authorization (CoA) when a port bounce occurs. A pointer is freed but was then referenced later in the same code path. Successful exploitation is outside the attacker's direct control due to the specific timing of the two events required to execute the vulnerable code path.
This issue affects systems with 802.1X authentication port-based network access control (PNAC) enabled.
This issue affects:
Junos OS:
* from 23.2R2-S1 before 23.2R2-S5,
* from 23.4R2 before 23.4R2-S6,
* from 24.2 before 24.2R2-S3,
* from 24.4 before 24.4R2-S1,
* from 25.2 before 25.2R1-S2, 25.2R2;
Junos OS Evolved:
* from 23.2R2-S1 before 23.2R2-S5-EVO,
* from 23.4R2 before 23.4R2-S6-EVO,
* from 24.2 before 24.2R2-S3-EVO,
* from 24.4 before 24.4R2-S1-EVO,
* from 25.2 before 25.2R1-S2-EVO, 25.2R2-EVO.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
释放后使用
来源: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 资源管理错误漏洞
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 Networks | Junos OS | 23.2R2-S1 ~ 23.2R2-S5 | - |
|
| Juniper Networks | Junos OS Evolved | 23.2R2-S1 ~ 23.2R2-S5-EVO | - |
|
二、漏洞 CVE-2026-21908 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-21908 厂商安全公告 (1)
同批安全公告 · Juniper Networks · 2026-01-15 · 共 23 条
| CVE-2026-21913 | 7.5 HIGH | Juniper Networks Junos OS 安全漏洞 |
| CVE-2026-21920 | 7.5 HIGH | Juniper Networks Junos OS 安全漏洞 |
| CVE-2025-60003 | 7.5 HIGH | Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 安全漏洞 |
| CVE-2026-21918 | 7.5 HIGH | Juniper Networks Junos OS 资源管理错误漏洞 |
| CVE-2026-21917 | 7.5 HIGH | Juniper Networks Junos OS 安全漏洞 |
| CVE-2026-21914 | 7.5 HIGH | Juniper Networks Junos OS 安全漏洞 |
| CVE-2026-21905 | 7.5 HIGH | Juniper Networks Junos OS 安全漏洞 |
| CVE-2026-21906 | 7.5 HIGH | Juniper Networks Junos OS 安全漏洞 |
| CVE-2025-59960 | 7.4 HIGH | Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 代码问题漏洞 |
| CVE-2026-21903 | 6.5 MEDIUM | Juniper Networks Junos OS 安全漏洞 |
| CVE-2026-21911 | 6.5 MEDIUM | Juniper Junos OS Evolved 安全漏洞 |
| CVE-2026-21910 | 6.5 MEDIUM | Juniper Networks Junos OS 代码问题漏洞 |
| CVE-2026-21909 | 6.5 MEDIUM | Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 安全漏洞 |
| CVE-2026-0203 | 6.5 MEDIUM | Juniper Networks Junos OS 安全漏洞 |
| CVE-2026-21921 | 6.5 MEDIUM | Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 资源管理错误漏洞 |
| CVE-2025-52987 | 6.1 MEDIUM | Juniper Networks Paragon Automation 安全漏洞 |
| CVE-2026-21907 | 5.9 MEDIUM | Juniper Networks Junos Space 加密问题漏洞 |
| CVE-2025-60011 | 5.8 MEDIUM | Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 代码问题漏洞 |
| CVE-2026-21912 | 5.5 MEDIUM | Juniper Networks Junos OS 安全漏洞 |
| CVE-2025-60007 | 5.5 MEDIUM | Juniper Networks Junos OS 代码问题漏洞 |
显示前 20 条，共 23 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-21908
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