Vulnerability · Published Apr 9, 2026 · Assigned by VulDB

CVE-2026-5854Totolink A7100RU CGI cstecgi.cgi setWiFiEasyCfg os command injection

Critical 9.8

In plain English

A critical-severity OS command injection in A7100RU from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 16.9% (higher than 97% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)16.9%top 2.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this issue is the function setWiFiEasyCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument merge results in os command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used.

Affected products (as reported)

Vendor	Product	Versions
Totolink	A7100RU	7.4cu.2313_b20191024

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-356380 | Totolink A7100RU CGI cstecgi.cgi setWiFiEasyCfg os command injection vdb-entry, technical-description
VDB-356380 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #791276 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection third-party-advisory
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_160/README.md exploit
https://www.totolink.net/ product