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 po…

EPSS: 0.019 (83.6th percentile) — read the EPSS interpretation.

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.

Affected products

Totolink Nr1800x — versions 9.1.0u.6279_B20210910

Weakness classification (CWE)

References

VDB-360358 | Totolink NR1800X cstecgi.cgi sub_41A68C command injection (technical-description, vdb-entry)
VDB-360358 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
Submit #804417 | Totolink C834FR-1C NR1800X command injection (third-party-advisory)
cna@vuldb.com (exploit)
cna@vuldb.com (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.