# CVE-2026-120283: Linksys E8450 stack-based buffer overflow in portal.cgi

Source: https://junglewise.ai/threats/cve-2026-120283-a-vulnerability-was-identified-in-linksys-e8450-1-2-00-360516  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-02. Updated: 2026-11-02  
License: CC BY 4.0 with a link back

CVE-2026-120283 · Severity: critical · CVSS 10 · Published 2026-11-02

The Linksys E8450 is a wireless router that secures home and small office networks. An unsafe use of strcpy in the portal configuration script allows an attacker to overwrite stack memory by sending a malicious hidden_timezone parameter, potentially leading to remote code execution without requiring authentication.

Vendors: [Linksys](https://junglewise.ai/threats/vendors/linksys).

## Quick answers

**Is CVE-2026-120283 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-120283 being exploited in the wild.

**How severe is CVE-2026-120283?** Critical severity, with a CVSS score of 10, published 2 November 2026.

**Which products and versions are affected?** Linksys E8450 1.2.00.360516.

**Is there a fix for CVE-2026-120283?** 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-2026-120283 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-120283?** Check whether you run Linksys E8450 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

A stack-based buffer overflow exists in the /www/cgi-bin/portal.cgi file due to unsafe use of strcpy when processing the hidden_timezone argument. The vulnerability is remotely exploitable over the network without authentication required. Successful exploitation allows an attacker to execute arbitrary code on the affected router.

## Affected products

- Linksys E8450 1.2.00.360516

## Timeline

- 2026-11-02: disclosed
- 2026-11-02: advisory

## References

- [https://vuldb.com/cve/CVE-2026-120283](https://vuldb.com/cve/CVE-2026-120283)
- [https://vuldb.com/submit/1014924](https://vuldb.com/submit/1014924)