# CVE-2026-126722: CVE-2026-126722

Status: published. Published: 2026-11-11. Updated: 2026-11-11.

Rooxis RXR-12 Wi-Fi router contains an undocumented telnet backdoor daemon (/usr/bin/telnetd_startup) that, upon receipt of a precomputed AES-128-CBC magic packet using a firmware-wide static key and IV, enables telnet service with default credentials, providing remote root access. Firmware 20260813_c2169ea5 removes the UDP listener entirely, and users can update through their local web interface.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Rooxis / Rooxis RXR-12: ≥ 0; < 20260813_c2169ea5 (affected, custom). Source: CNA: certcc

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-78

## Exploit evidence

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

## References

- https://rooxis.com/firmware/SOP-ramips-mt7621-DGR7-ROOXIS-local-debug.bin (CNA: certcc)

- https://lab.geodesy.phd/writeups/rooxis-router/ (CNA: certcc)

- https://lab.geodesy.phd/writeups/rooxis-router/ (cret@cert.org)

- https://rooxis.com/firmware/SOP-ramips-mt7621-DGR7-ROOXIS-local-debug.bin (cret@cert.org)

## Provenance

- CNA: certcc: https://www.cve.org/CVERecord?id=CVE-2026-126722; retrieved 2026-11-11; source updated 2026-11-11

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-126722; retrieved 2026-11-11; source updated 2026-11-11

Revision: 155ccc4545f9bc89aa16575d177c03f5fa7c9a08811065a54d9021ab343dd01b

Canonical: https://y2.dev/cve/CVE-2026-126722

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