RCE in Totolink Nr1800x
CVE-2026-5030
A vulnerability has been found in Totolink NR1800X 9.1.0u.6279_B20210910. This issue affects the function NTPSyncWithHost of the file /cgi-bin/cstecgi.cgi of the component Telnet Service. The manipulation of the argument host_time leads to command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.037 (89.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.025 · newest: 0.037 · change: +0.012
Affected products
- Totolink Nr1800x — versions 9.1.0u.6279_B20210910
- Totolink Nr1800x Firmware — versions 9.1.0u.6279_b20210910
Weakness classification (CWE)
References
- vuldb.com/vuln/353952 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/353952/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/778529 (VDB Entry, Third Party Advisory, third-party-advisory)
- lavender-bicycle-a5a.notion.site/TOTOLINK-NR1800X-NTPSyncWithHost-32153a41781f8… (Exploit, Third Party Advisory, exploit)
- www.totolink.net/ (Product, product)
Frequently asked questions
- What is CVE-2026-5030?
- CVE-2026-5030 is a medium-severity vulnerability in Totolink Nr1800x, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-03-29.
- How severe is CVE-2026-5030?
- Medium severity. CVSS v3 base score is 6.3 out of 10.