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Vulnerabilities

Vulnerability · CVE-2021-36380

Sunhillo SureLine OS Command Injection Vulnerablity

Published Aug 13, 2021 · catalog updated Jun 16, 2026 · Sunhillo SureLine

Patch now

CVE-2021-36380 is in the CISA known-exploited catalog, due Mar 26, 2024. Confirm Sunhillo SureLine against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
97.83%
Remediation
Remediation guidance
Affected products
cpe sunhillo/sureline · vendor Sunhillo SureLine

Sunhillo SureLine contains an OS command injection vulnerability that allows an attacker to cause a denial-of-service or utilize the device for persistence on the network via shell metacharacters in ipAddr or dnsAddr in /cgi/networkDiag.cgi.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe sunhillo/surelineversion unspecified
  • vendor Sunhillo SureLineversion unspecified

How to fix CVE-2021-36380

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-36380 is in the CISA known-exploited catalog, due Mar 26, 2024. Confirm Sunhillo SureLine against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-78: OS Command Injection. EPSS 97.83%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 13, 2021 · Catalog

    Detected

    Sunhillo SureLine contains an OS command injection vulnerability that allows an attacker to cause a denial-of-service or utilize the device for persistence on the network via shell metacharacters in ipAddr or dnsAddr in /cgi/networkDiag.cgi.

  2. Mar 5, 2024 · CISA KEV

    Known exploited

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

  3. Mar 26, 2024 · CISA KEV

    Remediation due

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

  4. Jun 16, 2026 · Catalog

    Updated

    Sunhillo SureLine contains an OS command injection vulnerability that allows an attacker to cause a denial-of-service or utilize the device for persistence on the network via shell metacharacters in ipAddr or dnsAddr in /cgi/networkDiag.cgi.

Sources

  • CISA KEVConfirmed exploitationCVE-2021-36380

    Sunhillo SureLine contains an OS command injection vulnerability that allows an attacker to cause a denial-of-service or utilize the device for persistence on the network via shell metacharacters in ipAddr or dnsAddr in /cgi/networkDiag.cgi.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-36380

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-36380

    30-day exploitation probability 97.8%

    first.org
  • NIST NVDVulnerability recordCVE-2021-36380

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

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2021-36380

    Sunhillo SureLine contains an OS command injection vulnerability that allows an attacker to cause a denial-of-service or utilize the device for persistence on the network via shell metacharacters in ipAddr or dnsAddr in /cgi/networkDiag.cgi.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.