Vulnerability · Published May 24, 2026 · Assigned by VulDB

CVE-2026-9407Totolink A8000RU Web Management cstecgi.cgi setFirewallType os command injection

Critical 9.8

In plain English

A critical-severity OS command injection in A8000RU from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 78% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)1.7%top 22.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A security vulnerability has been detected in Totolink A8000RU 7.1cu.643_b20200521. Affected by this vulnerability is the function setFirewallType of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. The manipulation of the argument firewallType leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used.

Affected products (as reported)

Vendor	Product	Versions
Totolink	A8000RU	7.1cu.643_b20200521

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-365388 | Totolink A8000RU Web Management cstecgi.cgi setFirewallType os command injection vdb-entry, technical-description
VDB-365388 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #813442 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection third-party-advisory
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_339/README.md exploit
https://www.totolink.net/ product