Vulnerability · Published Sep 15, 2026 · Assigned by VulDB

CVE-2026-91853TOTOLINK X5000R Export Ovpn cstecgi.cgi exportOvpn os command injection

High 7.4

In plain English

A high-severity OS command injection in X5000R from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 79% of all known vulnerabilities).

Severity (CVSS 3.1)7.4High

Exploit odds (30 days)1.8%top 21.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability has been found in TOTOLINK X5000R 9.1.0cu.2089_B20211224. The impacted element is the function exportOvpn of the file /cgi-bin/cstecgi.cgi?action=exportOvpn&type=user of the component Export Ovpn Handler. The manipulation of the argument filetype leads to os command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected products (as reported)

Vendor	Product	Versions
TOTOLINK	X5000R	9.1.0cu.2089_B20211224

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-404082 | TOTOLINK X5000R Export Ovpn cstecgi.cgi exportOvpn os command injection vdb-entry, technical-description
VDB-404082 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-91853 | CVE Analysis and Report third-party-advisory
Submit #933810 | TOTOLINK X5000R V9.1.0cu.2089_B20211224 Command Injection third-party-advisory
https://github.com/awigwu76/TOTOLINK_X5000R/blob/main/2.md exploit
https://www.totolink.net/ product