Juniper Session Smart Router: OS command injection in AccessManager audit rules
Summary
An OS command injection flaw (CWE-78) in the AccessManager component of Juniper Session Smart Router and Session Smart Conductor allows arbitrary file deletion and arbitrary command execution when an audit rule is deleted. An attacker needs a valid low-privileged account on the device or management platform, and the CVSS score is 8.8 (high). Juniper's SIRT is not aware of any malicious exploitation.
Affected
- Session Smart Router: versions before 7.0.5, 7.1.0 to before 7.1.7, and 7.2.0 to before 7.2.3
- Session Smart Conductor: versions before 7.0.5, 7.1.0 to before 7.1.7, and 7.2.0 to before 7.2.3
- Exact build numbers within each branch: verify in JSA112183
Fixed in
- Session Smart Router and Session Smart Conductor 7.0.5 and later
- Session Smart Router and Session Smart Conductor 7.1.7 and later
- Session Smart Router and Session Smart Conductor 7.2.3 and later
Workaround
- No known workarounds according to Juniper.
- Interim measure (own assessment, not a Juniper recommendation): restrict access to the management interfaces until the update is applied.
Exploitation
- No known malicious exploitation according to Juniper SIRT.
- Not listed in CISA KEV.
- No known public proof-of-concept exploits at publication.
- EPSS: 1.18 % (percentile 68).
Our recommendation
- Inventory all Session Smart Router and Session Smart Conductor deployments and confirm their versions.
- Upgrade to 7.0.5, 7.1.7 or 7.2.3 (or later) as described in JSA112183.
- Prioritise devices reachable from outside the network and devices with shared administrator accounts.
- Restrict management access to trusted administrators until patching is complete.
- Patch in the same maintenance window as the other CVEs in JSA112183, some of which are rated 9.8 and need no login.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Juniper Security Advisory JSA112183 supportportal.juniper.net
- VulDB CVE-2026-103403 vuldb.com
- Strix CVE-2026-103403 www.strix.ai
- Offseq threat radar CVE-2026-103403 radar.offseq.com
- Mallory summary CVE-2026-103403 mallory.ai
- SecurityOnline Juniper Session Smart Router vulnerabilities securityonline.info
- ThreatInt CVE-2026-103403 cve.threatint.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 09:32.
Original description (NVD)
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.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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