# CVE-2026-3868: CVE-2026-3868

Status: published. Published: 2026-04-27. Updated: 2026-11-02.

An improper handling of the length parameter inconsistency vulnerability has been identified in Moxa’s Secure Router. Because of improper validation of length parameters in the HTTPS management interface, an unauthenticated remote attacker could send specially crafted requests that trigger a buffer overflow condition, causing the web service to become unresponsive. Successful exploitation may result in a denial-of-service condition requiring a device reboot to restore normal operation. While successful exploitation can severely impact the availability of the affected device, no impact to the confidentiality or integrity of the affected product has been identified. Additionally, no confidentiality, integrity, or availability impact to the subsequent system has been identified.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Moxa / EDR-8010 Series: ≥ 1.0; ≤ 3.23 (affected, custom); 3.24 (unaffected, custom). Source: CNA: Moxa
- Moxa / EDR-G9010 Series: ≥ 1.0; ≤ 3.23.1 (affected, custom); 3.24 (unaffected, custom). Source: CNA: Moxa

## Severity and prioritization

- CVSS 4.0: 8.7 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N; source: CNA: Moxa

- CISA KEV: No listing in collected sources

- EPSS: 0.37% as of 2026-11-01; percentile 30.69%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-130

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.moxa.com/en/support/product-support/security-advisory/mpsa-261521-cve-2026-3867-cve-2026-3868-improper-ownership-management-and-improper-handling-of-length-parameter-incons (CNA: Moxa; vendor-advisory)

## Provenance

- CNA: Moxa: https://www.cve.org/CVERecord?id=CVE-2026-3868; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-3868; retrieved 2026-11-02; source updated Not reported

Revision: dbc6a7d1b4769659a2b2fde7a3a3656325ddc14add1611ac8bda3d5c95247865

Canonical: https://y2.dev/cve/CVE-2026-3868