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CVE-2026-103409— Session Smart Router: An attacker obtains administrative privileges when an unauthenticated internal endpoint is accessed

Quick assessment

Affected
Juniper Networks Session Smart Router
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Juniper Networks Session Smart Router 中存在一个关键功能缺少身份验证的漏洞。该漏洞允许未经身份验证的网络攻击者，通过向以 root 权限运行的不安全端点传递特制的 URL 参数，从而获取管理员权限。 请注意：此漏洞仅在设备尚未接入 Mist/Conductor 平台之前可被利用；一旦设备完成接入 Mist/Conductor，该漏洞将不再可被利用。

CVSS 9.8 · Critical

Affected Version Matrix 3

VendorProduct Version RangeStatus
Juniper Networks Session Smart Router < 7.0.5 affected
7.1.0< 7.1.7 affected
7.2.0< 7.2.3 affected
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I. Basic Information for CVE-2026-103409

Vulnerability Information
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Vulnerability Title
Session Smart Router: An attacker obtains administrative privileges when an unauthenticated internal endpoint is accessed
Source: CVE Program / CVE List V5
Vulnerability Description
A Missing authentication for critical function vulnerability in Juniper Networks Session Smart Router allows an unauthenticated network-based attacker to obtain administrative privileges by passing crafted URL parameters to an insecure endpoint running as root. Note that this vulnerability can only be exploited prior to the device being onboarded to Mist/Conductor. The issue can no longer be exploited once a device is onboarded to Mist/Conductor.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Juniper Networks Session Smart Router 0 ~ 7.0.5 -

II. Public POCs for CVE-2026-103409

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III. Intelligence Information for CVE-2026-103409

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Vendor Pages for CVE-2026-103409 (1)

Same Patch Batch · Juniper Networks · 2026-10-28 · 18 CVEs total

CVE-2026-103406 9.8 CRITICAL Session Smart Conductor: An unauthenticated attacker causes arbitrary command execution du
CVE-2026-106079 8.8 HIGH Session Smart Router and Session Smart Conductor: Improper validation of a field causes pr
CVE-2026-103408 8.8 HIGH Session Smart Router: An attacker-controlled input causes remote code execution when parsi
CVE-2026-103407 8.8 HIGH Session Smart Router and Session Smart Conductor: Unsanitized input allows arbitrary file
CVE-2026-103401 8.8 HIGH Session Smart Router and Session Smart Conductor: An attacker can overwrite arbitrary file
CVE-2026-103402 8.8 HIGH Session Smart Router and Session Smart Conductor: Lack of integrity verification in cache
CVE-2026-103403 8.8 HIGH Session Smart Router and Session Smart Conductor: Unvalidated input causes arbitrary file
CVE-2026-103410 7.5 HIGH Session Smart Router: Integer overflow causes denial of service during TLS certificate ins
CVE-2026-103411 7.1 HIGH Session Smart Router: A malicious DHCP server causes information disclosure and a service
CVE-2026-103404 6.8 MEDIUM Session Smart Conductor: Insecure file permissions cause unauthorized access to sensitive
CVE-2026-103405 5.8 MEDIUM Session Smart Router and Session Smart Conductor: Unsanitized input causes HTTP response s
CVE-2026-103400 5.5 MEDIUM Session Smart Router and Session Smart Conductor: Crafted directory names cause arbitrary
CVE-2026-103391 5.3 MEDIUM Session Smart Router: An attacker-controlled TCP option causes an out-of-bounds write when
CVE-2026-103390 5.3 MEDIUM Session Smart Router and Session Smart Conductor: A malformed HTTP URI causes a service cr
CVE-2026-103392 4.8 MEDIUM Session Smart Router: A SACK option causes out-of-bounds memory access and TCP payload cor
CVE-2026-103393 4.3 MEDIUM Session Smart Router: An attacker can cause an out-of-bounds read during VRRP packet proce
CVE-2026-103394 3.7 LOW Session Smart Router: An incomplete operator causes the use of incorrect encryption keys d

IV. Related Vulnerabilities

Same product: Session Smart Router
Same vendor: Juniper Networks
Same weakness: CWE-306