Juniper Session Smart Router: Schwachstelle ermöglicht Erlangen von Administratorrechten
WID-SEC-2025-0393 · first 18.02.2025 · updated 28.01.2026 · CVSS 9,8
What it is about
Der Session Smart Router von Juniper ist eine Software-Defined Wide Area Network (SD-WAN)-Lösung, die eine tunnelfreie Architektur nutzt. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Juniper Session Smart Router ausnutzen, um Administratorrechte zu erlangen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- Administratorrechte zu erlangen
Am I affected?
Affected according to the BSI:
- Juniper Session Smart Router <5.6.17
- Juniper Session Smart Router <6.1.12-lts
- Juniper Session Smart Router <6.2.8-lts
- Juniper Session Smart Router <6.3.3-r2
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Juniper Session Smart Router 5.6.17
- Juniper Session Smart Router 6.1.12-lts
- Juniper Session Smart Router 6.2.8-lts
- Juniper Session Smart Router 6.3.3-r2
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Juniper Security Advisory JSA94663 / Out-of-Cycle Security Bulletin vom 2025-02-11 supportportal.juniper.net
CVE: CVE-2025-21589
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.