Vulnerability · Published Apr 28, 2026 · Assigned by VulDB

CVE-2026-7243Totolink A8000RU CGI cstecgi.cgi setRadvdCfg 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 2.4% (higher than 84% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)2.4%top 15.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument maxRtrAdvInterval leads to os command injection. It is possible to initiate the attack remotely. The exploit is publicly available and might 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-359850 | Totolink A8000RU CGI cstecgi.cgi setRadvdCfg os command injection vdb-entry, technical-description
VDB-359850 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #803266 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection third-party-advisory
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_327/README.md exploit
https://www.totolink.net/ product