Vulnerability · Published Jan 22, 2026 · Assigned by VulDB

CVE-2026-1326Totolink NR1800X POST Request cstecgi.cgi setWanCfg command injection

Medium 6.3

In plain English

A medium-severity command injection in NR1800X from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 3.5% (higher than 89% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)3.5%top 10.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A weakness has been identified in Totolink NR1800X 9.1.0u.6279_B20210910. This vulnerability affects the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. This manipulation of the argument Hostname causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

Affected products (as reported)

Vendor	Product	Versions
Totolink	NR1800X	9.1.0u.6279_B20210910

Weakness: CWE-77, CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-342302 | Totolink NR1800X POST Request cstecgi.cgi setWanCfg command injection vdb-entry, technical-description
VDB-342302 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #735787 | TOTOLINK NR1800X NR1800X_Firmware V9.1.0u.6279_B20210910 Command Injection third-party-advisory
https://lavender-bicycle-a5a.notion.site/TOTOLINK-NR1800X-setWanCfg-2e453a41781f80b390f3e1ce0d9dd5b9?source=copy_link exploit
https://www.totolink.net/ product