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ExploitedIn CISA KEVFix available

CVE-2021-36380

Exploitation confirmed. First attested on 2023-10-13 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2021-08-13
  • Fixed in8.7.0.1.1
  • WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2021-08-1316:15CVE publishedNVD
  2. 2023-10-1316:31Listed as exploited by GCVEGCVE
  3. 2023-10-1316:31Exploitation first reportedGCVE
  4. 2024-03-05Added to the CISA KEV catalogCISA KEV
  5. 2024-03-0505:00SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-36380?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-36380?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · CISA-ADP
Sunhillo sureline
BranchAffectedFixed in
8.7< 8.7.0.1.18.7.0.1.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Sunhillo sureline to 8.7.0.1.1
  2. CISA’s required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.due 2024-03-26

Detection

read 2026-11-03 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2024-03-05
Patch Due Date
2024-03-26
Ransomware Use
Unknown
Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-08-13
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-76jq-2jjj-76w4

Frequently asked questions

What is CVE-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.

Is CVE-2021-36380 actively exploited?

Yes. CVE-2021-36380 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2024-03-26.

What is the CVSS score for CVE-2021-36380?

CVE-2021-36380 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record