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Session Smart Router CVE-2026-106079

| EUVDEUVD-2026-112167 HIGH
OS Command Injection (CWE-78)
2026-10-28 juniper GHSA-m4j2-cq9m-w4h4
8.8
CVSS 3.1 · NVD
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain config-write privileges on management plane
  2. Exploit
    Inject OS command via crafted YANG configuration
  3. Execution
    AccessManager passes unneutralized input to shell
  4. Impact
    Command executes as root, full device compromise

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization OS command sanitization, avoid shell exec
MITRE ATT&CK

2 techniques across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires the attacker to already hold config-write privileges on the Session Smart Router or Conductor and to supply a malicious YANG configuration whose value reaches AccessManager, which fails to neutralize OS command special elements and runs the input as root. The limiting factor is this config-write authentication level (CVSS PR:L) - the flaw is not exploitable by unauthenticated or read-only users - which confines the realistic threat to lower-tier administrators, insiders, or holders of compromised management credentials; no end-user interaction is required (UI:N) and the management interface is network-reachable (AV:N).

Impact

The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, base 8.8) indicates a network-reachable, low-complexity flaw that requires privileges (PR:L) - specifically the config-write role named in the description - and yields full confidentiality, integrity and availability impact via arbitrary command execution as root. This is a privilege-to-root escalation rather than a pre-auth breach: an actor must already hold config-write access, so the realistic threat model is a lower-tier administrator, a compromised management credential, or an insider rather than an anonymous internet attacker. No EPSS score, no CISA KEV listing, and no POC or exploit reference are present in the supplied data, so there is no signal of active or probable exploitation; the only quantitative priority cue is the vendor feed's 'this_week' decision label, which reflects a serious-but-not-emergency posture consistent with a vendor-reported authenticated flaw. The signals are internally consistent (high severity, but gated behind an administrative privilege), so this reads as a genuine high-severity issue to patch on a near-term schedule rather than a drop-everything emergency - the PR:L gate is the main factor lowering real-world risk. No conflicting signals were detected in the provided inputs; the main gaps are the absence of EPSS/KEV/POC data and of fixed-version information.

Exploit ScenarioDerived

An actor holding config-write privileges on a Session Smart Router or Conductor (a lower-privileged operator, an insider, or an attacker using stolen management credentials) submits a crafted YANG configuration whose value contains shell metacharacters in a field processed by AccessManager. Because the input is not neutralized before being passed to an OS command, the payload executes as root, giving full control of the device. No public exploit was identified at time of analysis; the network vector and low attack complexity mean exploitation is straightforward once the required config-write access is obtained.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available

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AnalysisAIv1 – Oct 28, 2026

Juniper Networks Session Smart Router and Session Smart Conductor are exposed to OS command injection through AccessManager, allowing a user who already holds config-write privileges to obtain arbitrary command execution as root by supplying a crafted value in the YANG configuration. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, base 8.8) reflects a network-reachable, low-complexity flaw that is gated by authentication (PR:L) rather than by any user interaction, with full confidentiality, integrity and availability impact once triggered. No public exploit code or active exploitation has been identified at time of analysis, and the realistic threat is confined to lower-tier administrators, insiders or holders of compromised management credentials.

RemediationAI

Apply the Juniper fix referenced in advisory JSA112183 (https://supportportal.juniper.net/JSA112183), which is the authoritative source for the exact patched release per branch; the supplied intelligence does not list specific fix version numbers, so verify the target release against that advisory before upgrading Session Smart Router and Session Smart Conductor. Until the upgrade is in place, the effective control follows directly from the assessed precondition: the flaw is only reachable by a principal holding config-write privileges through the network-exposed management interface, so audit and tightly scope config-write role assignments to the smallest set of trusted administrators and remove stale or shared accounts, accepting that this does not remove the vulnerability for legitimate privileged operators. Because the management plane is the attack surface (AV:N), restricting reachability of the router and conductor management interfaces to dedicated administrative networks or bastion hosts reduces exposure, with the trade-off of added operational friction for routine configuration work. Monitoring and alerting on YANG configuration commits and on unexpected root-level process activity on the conductor gives detection coverage for attempted abuse while remediation is pending.

Affected VersionsENISA

Session Smart Router 7.2.0 <7.2.3
Session Smart Router 0 <7.0.5
Session Smart Conductor 7.2.0 <7.2.3
Session Smart Conductor 7.1.0 <7.1.7
Session Smart Conductor 0 <7.0.5
Session Smart Router 7.1.0 <7.1.7

Affected Packages

euvd session_smart_conductor fix: 7.0.5, 7.1.7, 7.2.3
euvd session_smart_router fix: 7.0.5, 7.1.7, 7.2.3

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The flaw is a CWE-78 OS command injection: a value carried inside the YANG configuration model is passed into AccessManager, which fails to neutralize shell metacharacters and executes the resulting input with root privileges on the Session Smart Router or Conductor. YANG is the data-modeling language behind the NETCONF/management configuration surface of these appliances, which is why the attack path runs through configuration writes rather than a bespoke network protocol handler. The CPE data (cpe:2.3:a:juniper_networks:session_smart_router and ...:session_smart_conductor, both wildcarded to all versions) shows the exposure spans both the routing platform and the conductor/orchestration component, and no specific version boundary is enumerated in the supplied intelligence. Per the independent assessment, the trigger requires an authenticated principal with config-write rights capable of injecting a malicious value that reaches AccessManager; the exact parsing path by which the crafted YANG value reaches the shell is not described in the available sources. Because the resulting execution context is root, the privilege gained far exceeds the config-write privilege required to initiate the attack.

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Severity by source

Vendor (juniper) PRIMARY HIGH
NVD 8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 8.8 HIGH

Network-reachable management interface (AV:N) with the config-write role as the required privilege (PR:L); unneutralized input executes as root giving full C/I/A impact within the same device authority (S:U).

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (juniper).

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Patch available
Oct 28, 2026 - 17:19 EUVD
CVE Published
Oct 28, 2026 - 16:37 cve.org
HIGH 8.8

DescriptionNVD

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 with config-write privileges to achieve arbitrary command execution as root in the YANG configuration.

Executive ViewAI

Why It Matters

CVE-2026-106079 is a high-severity OS command injection flaw in Juniper Session Smart Router and Conductor that allows an authenticated user with config-write privileges to execute arbitrary commands as root. This elevates the risk of insider threat or compromised administrative credentials, enabling full control over affected network infrastructure. Leadership should prioritize remediation because exploitation could lead to complete compromise of routing and session management systems, impacting service availability and data integrity.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations include restricting config-write privileges to essential personnel, enforcing MFA and strong authentication for management access, monitoring configuration changes for suspicious activity, and segmenting management networks from untrusted networks.

Threat Intelligence Overview

Prevalence
Medium
Juniper SD-WAN/SSR appliance, moderate enterprise footprint, not ubiquitous
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS N/A
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

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