Vulnerability · Published Apr 6, 2026 · Assigned by VulDB
CVE-2026-5677Totolink A7100RU cstecgi.cgi CsteSystem os command injection
High 7.3
In plain English
A high-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 1.3% (higher than 71% of all known vulnerabilities).
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)1.3%top 29.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. Impacted is the function CsteSystem of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument resetFlags results in os command injection. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks.
Affected products (as reported)
Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
References
- VDB-355504 | Totolink A7100RU cstecgi.cgi CsteSystem os command injection vdb-entry, technical-description
- VDB-355504 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- Submit #792606 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection third-party-advisory
- https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_184/README.md exploit
- https://www.totolink.net/ product