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CVE-2026-103403— Session Smart Router and Session Smart Conductor: Unvalidated input causes arbitrary file deletion and command execution when deleting audit rules

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.

在 Juniper Networks Session Smart Router 和 Session Smart Conductor 的 AccessManager 组件中，存在一个“操作系统命令中特殊元素未正确中和”（即“操作系统命令注入”）漏洞。攻击者可通过删除审计规则，利用该漏洞执行任意文件删除和任意命令执行操作。

CVSS 8.8 · High Updated Oct 29, 2026

Possible ATT&CK Techniques 2 AI

T1059.004 · Unix Shell T1190 · Exploit Public-Facing Application

Affected Version Matrix 6

Vendor	Product	Version Range	Status
Juniper Networks	Session Smart Conductor	`< 7.0.5`	affected
		`7.1.0< 7.1.7`	affected
		`7.2.0< 7.2.3`	affected
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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Vulnerability Information

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Vulnerability Title

Session Smart Router and Session Smart Conductor: Unvalidated input causes arbitrary file deletion and command execution when deleting audit rules

Source: CVE Program / CVE List V5

Vulnerability Description

An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in AccessManager in Juniper Networks Session Smart Router and Session Smart Conductor allows an attacker to perform arbitrary file deletion and arbitrary command execution via the deletion of an audit rule.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

OS命令中使用的特殊元素转义处理不恰当(OS命令注入)

Source: CVE Program / CVE List V5

Affected Products

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

II. Public POCs for CVE-2026-103403

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-103403

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Other References for CVE-2026-103403 (1)

https://supportportal.juniper.net/JSA112183 vendor-advisory

https://www.cve.org/CVERecord?id=CVE-2026-103403

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

CVE-2026-103409	9.8 CRITICAL	Session Smart Router: An attacker obtains administrative privileges when an unauthenticate
CVE-2026-103406	9.8 CRITICAL	Session Smart Conductor: An unauthenticated attacker causes arbitrary command execution du
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-2026-106079	8.8 HIGH	Session Smart Router and Session Smart Conductor: Improper validation of a field causes pr
CVE-2026-103402	8.8 HIGH	Session Smart Router and Session Smart Conductor: Lack of integrity verification in cache
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-78