# CVE-2021-36380: Sunhillo SureLine OS Command Injection Vulnerablity

> CVE-2021-36380: Sunhillo SureLine OS Command Injection Vulnerablity. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2021-36380
Last updated: 2025-10-21T23:25:38Z

- Published: 2021-08-13 15:53 UTC · Updated: 2025-10-21 23:25 UTC · Assigner: mitre
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 97.8%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2024-03-05, federal due date 2024-03-26, ransomware use: Unknown

## Description

Sunhillo SureLine before 8.7.0.1.1 allows Unauthenticated OS Command Injection via shell metacharacters in ipAddr or dnsAddr /cgi/networkDiag.cgi.

## CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- sunhillo: sureline

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-36380)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2021-36380)
- [https://research.nccgroup.com/2021/07/26/technical-advisory-sunhillo-sureline-unauthenticated-os-command-injection-cve-2021-36380/](https://research.nccgroup.com/2021/07/26/technical-advisory-sunhillo-sureline-unauthenticated-os-command-injection-cve-2021-36380/)
- [https://www.sunhillo.com/product/sureline/](https://www.sunhillo.com/product/sureline/)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2021-36380 · Markdown: https://rewindex.com/cve/CVE-2021-36380.md · JSON: https://rewindex.com/api/v1/cves/CVE-2021-36380 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:06:11.687Z