Vulnerability · Published Mar 30, 2026 · Assigned by VulDB

CVE-2026-5105Totolink A3300R Parameter cstecgi.cgi setVpnPassCfg command injection

Medium 6.3

In plain English

A medium-severity command injection in A3300R from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 4.1% (higher than 91% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)4.1%top 9.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was detected in Totolink A3300R 17.0.0cu.557_b20221024. The affected element is the function setVpnPassCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. Performing a manipulation of the argument pptpPassThru results in 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	A3300R	17.0.0cu.557_b20221024

Weakness: CWE-77, CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-354130 | Totolink A3300R Parameter cstecgi.cgi setVpnPassCfg command injection vdb-entry, technical-description
VDB-354130 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #779143 | Totolink A3300R 17.0.0cu.557_b20221024 Command Injection third-party-advisory
https://github.com/LvHongW/Vuln-of-totolink_A3300R/tree/main/A3300R_pptpPassThru_cmd_inject exploit
https://www.totolink.net/ product