CVE-2026-103401
Session Smart Router and Session Smart Conductor: An attacker can overwrite arbitrary files as root
No known exploitation. EPSS puts it in the 28th percentile. Fixed versions are out.
No public exploit knownFix2 products3 fixed builds listed below
No ready-made check. Neither Nuclei nor OpenVAS has one for this CVE yet.
What to do
Find your product and version, then upgrade to the build on the right.
- Juniper Networks Session Smart RouterAffected: < 7.0.5Upgrade to: 7.0.5Affected: ≥ 7.1.0, < 7.1.7Upgrade to: 7.1.7Affected: ≥ 7.2.0, < 7.2.3Upgrade to: 7.2.3Stated by: CVE record
- Juniper Networks Session Smart ConductorAffected: < 7.0.5Upgrade to: 7.0.5Affected: ≥ 7.1.0, < 7.1.7Upgrade to: 7.1.7Affected: ≥ 7.2.0, < 7.2.3Upgrade to: 7.2.3Stated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
An Improper Link Resolution Before File Access ('Link Following') vulnerability in the unauthenticated web server handlers in Juniper Networks Session Smart Router and Session Smart Conductor allows a local unprivileged user to overwrite arbitrary files as root via unauthenticated API endpoints. This vulnerability can be exploited on Mist-managed routers and on unmanaged Routers that have not yet been onboarded to a Conductor. Routers already managed by Conductor are not affected.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.3% chance of exploitation activity in the next 30 days, which ranks it in the 28th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
6 events over 0 days, from the signal feeds we watch.
- Patch availableworkaround available, published, weakness classified, att&ck mapped, record updated
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Scored 8.8 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
In the news
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