Linksys E1700: OS command injection in static route handler
Summary
The Linksys E1700 wireless router with firmware 1.0.0.4.003 contains an OS command injection flaw in the addStaticRoute function at /goform/addStaticRoute. The IP, netmask, gateway and metric parameters are passed to the operating system without proper validation. A remote attacker can run arbitrary operating system commands on the device, potentially taking full control of the router, if they can reach the web administration interface. A public exploit is available, and the vendor did not respond to early disclosure contact.
Affected
- Linksys E1700 with firmware 1.0.0.4.003
- Other firmware versions and models: Unknown.
Fixed in
- Unknown. No vendor fix or advisory has been found.
Workaround
- Disable remote management and restrict access to the web administration interface to trusted internal hosts.
- Change the default administrator password to a unique, strong one.
- Segment the router from critical systems and guest or IoT networks.
Exploitation
- Public exploit: yes, according to VulDB; a proof of concept is published.
- Exploited in the wild: no known reports.
- CISA SSVC: exploitation PoC, automatable no, technical impact total.
- Authentication requirement: unverified (CVSS vector contains PR:L).
Our recommendation
- Check immediately whether the router's web administration or remote management is reachable from the internet and disable it if so.
- Restrict administrative access to specific trusted hosts and replace default credentials.
- Review static route entries for unexpected changes and monitor the device for anomalous behaviour.
- Check the Linksys support site for firmware updates; if no fix appears and the device is exposed or business-critical, plan replacement with a supported model.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- GitHub: wudipjq/my_vuln Linksys E1700 write-up github.com
- VulDB CVE-2026-108894 vuldb.com
- VulDB vulnerability 416686 vuldb.com
- VulDB CTI 416686 vuldb.com
- OpenCVE CVE-2026-108894 app.opencve.io
- PSIRT CVE-2026-108894 psirt.com
- Vulners RAPID7:CVE-2026-108894 vulners.com
- Linksys homepage www.linksys.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 1 Nov 2026, 08:51.
Original description (NVD)
A security flaw has been discovered in Linksys E1700 1.0.0.4.003. Impacted is the function addStaticRoute of the file /goform/addStaticRoute of the component Static Route Handler. Performing a manipulation of the argument staticRoute_IP_setting/staticRoute_Netmask_setting/staticRoute_Gateway_setting/staticRoute_Metric_setting results in os command injection. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
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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