Vulnerability · Published Apr 6, 2026 · Assigned by VulDB
CVE-2026-5676Totolink A8000R cstecgi.cgi setLanguageCfg missing authentication
High 7.3
In plain English
A high-severity missing authentication in A8000R from Totolink. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.4%top 63.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A vulnerability was identified in Totolink A8000R 5.9c.681_B20180413. This issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument langType leads to missing authentication. The attack can be launched remotely. The exploit is publicly available and might be used.
Affected products (as reported)
Weakness: CWE-306, CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R
References
- VDB-355503 | Totolink A8000R cstecgi.cgi setLanguageCfg missing authentication vdb-entry, technical-description
- VDB-355503 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #792433 | Totolink A8000R V5.9c.681_B20180413 Improper Authentication third-party-advisory
- https://github.com/skeetabc/CVE-TOTOLINK-A800R/blob/main/vuln1_auth_bypass.md exploit
- https://www.totolink.net/ product