# CVE-2026-112351: Sunhillo SureLine OS Command Injection via networkDiag.cgi

Status: published. Published: 2026-10-27. Updated: 2026-11-03.

Sunhillo SureLine before 9.1.5 contains an OS command injection vulnerability in the networkDiag.cgi endpoint that allows an authenticated remote attacker with any web account to execute arbitrary commands as root by injecting shell metacharacters into the ipAddr or dnsAddr parameters. Attackers can bypass the incomplete character denylist from the prior CVE-2021-36380 fix using URL-encoded newline (%0a) or ampersand (%26) sequences that act as command separators after decoding in the ping, nslookup, or traceroute diagnostic modes, leading to full system compromise.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Sunhillo Corporation / SureLine: ≥ 8.6.0; < 9.1.5 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 8.7 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 2.68% as of 2026-11-02; percentile 85.83%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-78

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.sunhillo.com/product/sureline/ (CNA: VulnCheck; product)

- https://www.vulncheck.com/advisories/sunhillo-sureline-os-command-injection-via-networkdiag-cgi (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-112351; retrieved 2026-11-03; source updated 2026-11-03

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-112351; retrieved 2026-11-03; source updated Not reported

Revision: d635db542a865a54549dac028dafa7e6bc41ecd22da237577a9e12d51410beeb

Canonical: https://y2.dev/cve/CVE-2026-112351

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