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CVE-2021-36380 (GCVE-0-2021-36380)

Vulnerability from cvelistv5 – Published: 2021-08-13 15:53 – Updated: 2025-10-21 23:25
VLAI CISA Shadowserver Previdian
Summary
Sunhillo SureLine before 8.7.0.1.1 allows Unauthenticated OS Command Injection via shell metacharacters in ipAddr or dnsAddr /cgi/networkDiag.cgi.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-05 05:00 UTC
CWE
  • n/a
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
Impacted products
Vendor Product Version CPE status
sunhillo sureline Affected: 0 , < 8.7.0.1.1 (custom)
    cpe:2.3:a:sunhillo:sureline:*:*:*:*:*:*:*:*
Create a notification for this product.
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 56b4cf48-5d55-45d0-add9-c066e208419f

Vulnerability ID: CVE-2021-36380

Status: Confirmed

Status Updated: 2024-03-05 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2024-03-05
Asserted: 2024-03-05
Scope
Notes: KEV entry: Sunhillo SureLine OS Command Injection Vulnerablity | Affected: Sunhillo / SureLine | Description: 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. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2024-03-26 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://www.sunhillo.com/fb011/; https://nvd.nist.gov/vuln/detail/CVE-2021-36380
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-78
Feed CISA Known Exploited Vulnerabilities Catalog
Product SureLine
Due Date 2024-03-26
Date Added 2024-03-05
Vendorproject Sunhillo
Vulnerabilityname Sunhillo SureLine OS Command Injection Vulnerablity
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:26 UTC | Updated: 2026-02-06 07:17 UTC
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 503042c4-c598-4c3e-8db9-be4d77918090

Vulnerability ID: CVE-2021-36380

Status: Confirmed

Status Updated: 2026-07-19 00:00 UTC

Exploited: Yes

Characteristics
Severity: 98.0
Timestamps
First Seen: 2023-10-13
Asserted: 2023-10-13
Last Seen: 2026-07-19
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Sunhillo / Sureline | Class: other-software | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-07-19: 1
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 1
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class other-software
7D Avg 1
Vendor Sunhillo
30D Avg 3
90D Avg 3
Product Sureline
Cisa Kev yes
Connections 1
Observation Date 2026-07-19
Vulnerability Class CVSS
Vulnerability Score 9.8
Vulnerability Severity Critical
References
Created: 2026-06-30 09:22 UTC | Updated: 2026-07-21 01:02 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: bdc1a328-9671-46d6-b0e4-b34dfae3d995

Vulnerability ID: CVE-2021-36380

Status: Confirmed

Status Updated: 2024-03-05 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2024-03-05
Asserted: 2024-03-05
Scope
Notes: KEVIntel entry: Sunhillo SureLine before 8.7.0.1.1 allows Unauthenticated OS Command Injection via shell metacharacters in ipAddr or dnsAddr /cgi/networkDiag.cgi. | Affected: Sunhillo / SureLine | CVSS: 9.8 (CRITICAL) | EPSS: 0.97599 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Sunhillo SureLine before 8.7.0.1.1 allows Unauthenticated OS Command Injection via shell metacharacters in ipAddr or dnsAddr /cgi/networkDiag.cgi.
Vendor Sunhillo
Product SureLine
Added Date 2024-03-05T00:00:00.000Z
Cvss Score 9.8
Epss Score 0.97599
Cvss Severity CRITICAL
Epss Percentile 0.99894
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:05 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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    "redhat_vex": {
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      "cve": "CVE-2021-36380",
      "id": "CVE-2021-36380",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "CVE-2021-36380",
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}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.