---
title: "CVE-2026-91853: TOTOLINK X5000R - Command Injection"
description: "TOTOLINK X5000R 9.1.0cu.2089_B20211224 contains a command injection caused by manipulation of the \"filetype\" argument in exportOvpn function of /cgi-bin/cstecgi.cgi, letting remote attackers execute OS commands, exploit requires no special privileges."
url: https://panop.io/threat-heartbeat/CVE-2026-91853/
---

# CVE-2026-91853 TOTOLINK X5000R - Command Injection

TOTOLINK X5000R 9.1.0cu.2089\_B20211224 contains a command injection caused by manipulation of the "filetype" argument in exportOvpn function of /cgi-bin/cstecgi.cgi, letting remote attackers execute OS commands, exploit requires no special privileges.

CVSS base score 7.4 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

1.82% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-91853)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L

Published

15 September 2026

Updated

15 October 2026

Weakness

[CWE-77](https://cwe.mitre.org/data/definitions/77.html)

## Vendor fix

Update to the latest version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-91853](https://nvd.nist.gov/vuln/detail/CVE-2026-91853)
- [https://github.com/awigwu76/TOTOLINK\_X5000R/blob/main/2.md](https://github.com/awigwu76/TOTOLINK_X5000R/blob/main/2.md)
- [https://vuldb.com/cve/CVE-2026-91853](https://vuldb.com/cve/CVE-2026-91853)
- [https://vuldb.com/submit/933810](https://vuldb.com/submit/933810)
- [https://vuldb.com/vuln/404082](https://vuldb.com/vuln/404082)
- [https://vuldb.com/vuln/404082/cti](https://vuldb.com/vuln/404082/cti)
- [https://www.totolink.net/](https://www.totolink.net/)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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