What is CVE-2026-7548?

CVE-2026-7548 is a high-severity vulnerability in Totolink Nr1800x, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 8.8/10. Published 2026-05-01.

How severe is CVE-2026-7548?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Totolink Nr1800x

CVE-2026-7548

A vulnerability was detected in Totolink NR1800X 9.1.0u.6279_B20210910. This affects the function sub_41A68C of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument setUssd results in command injection. The attack is possible to be carried out remotely. The exploit is now public and may be used.

Published 2026-05-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.029 (86.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.029 · change: +0.014

Affected products

Totolink Nr1800x — versions 9.1.0u.6279_B20210910

Weakness classification (CWE)

References

vuldb.com/vuln/360358 (technical-description, vdb-entry)
vuldb.com/vuln/360358/cti (signature, permissions-required)
vuldb.com/submit/804417 (third-party-advisory)
github.com/newym/cve/blob/main/totolink nr1800x command injection.md (exploit)
www.totolink.net/ (product)

Frequently asked questions

What is CVE-2026-7548?: CVE-2026-7548 is a high-severity vulnerability in Totolink Nr1800x, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 8.8/10. Published 2026-05-01.
How severe is CVE-2026-7548?: High severity. CVSS v3 base score is 8.8 out of 10.