# CVE-2026-108896: Linksys E1700 OS command injection in IPv6 configuration

Source: https://junglewise.ai/threats/cve-2026-108896-a-vulnerability-was-found-in-linksys-e1700-1-0-0-4-003-this  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-12. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-108896 · Severity: critical · CVSS 9.9 · Published 2026-10-12

The Linksys E1700 router contains a remote command injection vulnerability in its IPv6 configuration handler that allows attackers to execute arbitrary operating system commands without authentication. An attacker on the network can craft a malicious request to the router's web interface to gain complete control of the device, enabling data theft, network compromise, or use as a launching point for further attacks.

Technologies: [Linksys E1700](https://junglewise.ai/threats/technologies/e1700). Vendors: [Linksys](https://junglewise.ai/threats/vendors/linksys).

## Quick answers

**Is CVE-2026-108896 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-108896 being exploited in the wild.

**How severe is CVE-2026-108896?** Critical severity, with a CVSS score of 9.9, published 12 October 2026.

**Which products and versions are affected?** Linksys E1700 1.0.0.4.003.

**Is there a fix for CVE-2026-108896?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-108896 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-108896?** Check whether you run Linksys E1700 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The setLinksysIpv6 function in the /goform/setLinksysIpv6 endpoint fails to sanitize the _6rd_prefix and _6rd_prefix_len parameters before passing them through the ipv6cmd binary, leading to OS command injection. The vulnerability is network-accessible and requires no authentication; an attacker can inject shell commands (e.g., via backticks) that are executed with router privileges.

## Affected products

- Linksys E1700 1.0.0.4.003

## Timeline

- 2026-10-12: disclosed: Vulnerability disclosed publicly on GitHub; vendor did not respond to early disclosure attempt

## References

- [https://github.com/wudipjq/my_vuln/blob/main/Linksys3/vuln_70/70.md](https://github.com/wudipjq/my_vuln/blob/main/Linksys3/vuln_70/70.md)
- [https://vuldb.com/cve/CVE-2026-108896](https://vuldb.com/cve/CVE-2026-108896)

## Related threats

- [Linksys E1700 OS command injection in DMZ function](https://junglewise.ai/threats/cve-2026-108895-a-weakness-has-been-identified-in-linksys-e1700-1-0-0-4-003-the)
- [Linksys E1700 OS command injection in static route handler](https://junglewise.ai/threats/cve-2026-108894-a-security-flaw-has-been-discovered-in-linksys-e1700-1-0-0-4-003)
- [Linksys E1700 stack buffer overflow in setVlan](https://junglewise.ai/threats/cve-2026-108893-a-vulnerability-was-identified-in-linksys-e1700-up-to-1-0-0-4)
- [Linksys E1700 stack buffer overflow in MAC filter](https://junglewise.ai/threats/cve-2026-108892-a-vulnerability-was-determined-in-linksys-e1700-1-0-0-4-003-this)