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CVE-2021-36380

Sunhillo SureLine OS Command Injection Vulnerablity

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 97.6%
  1. Published13 Aug 2021
  2. Added to CISA KEV5 Mar 2024
  3. Remediation due26 Mar 2024
Actively exploited (CISA KEV)

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.

Added to KEV: 5 Mar 2024Federal remediation due: 26 Mar 2024

Description

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

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Sunhillo Sureline< 8.7.0.1.1

Remediation

Fixed in
Sunhillo Sureline≥ 8.7.0.1.1

References

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Frequently asked

Is CVE-2021-36380 being actively exploited?

Yes. CVE-2021-36380 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 5 Mar 2024.

How severe is CVE-2021-36380?

CVE-2021-36380 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 97.6% probability of exploitation.

Which products are affected by CVE-2021-36380?

Affected products include Sunhillo Sureline.

How do I fix CVE-2021-36380?

Upgrade affected software to a fixed version, for example Sunhillo Sureline 8.7.0.1.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2021-36380 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.