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Critical severity · published Mar 29, 2026
CVE-2026-5030
Totolink NR1800X Telnet Service cstecgi.cgi NTPSyncWithHost command injection
9.8
CVSS
2.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.6% · higher than 85% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NR
NR1800X · Totolink
9.1.0u.6279_B20210910 · source: vendor
NF
Nr1800x Firmware · Totolink
9.1.0u.6279_b20210910 · source: NVD
Affected product
NR
NR1800X
Totolink
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5030
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5030
Exploit
https://lavender-bicycle-a5a.notion.site/TOTOLINK-NR1800X-NTPSyncWithHost-32153a41781f8032afebc0802b704e9c?source=copy_link
Third Party Advisory
https://vuldb.com/submit/778529
Third Party Advisory
https://vuldb.com/vuln/353952
Permissions Required
https://vuldb.com/vuln/353952/cti
Product
https://www.totolink.net/
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