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CVE-2021-40870 (GCVE-0-2021-40870)

Vulnerability from cvelistv5 – Published: 2021-09-13 07:41 – Updated: 2025-10-21 23:25
VLAI CISA Shadowserver Previdian
Summary
An issue was discovered in Aviatrix Controller 6.x before 6.5-1804.1922. Unrestricted upload of a file with a dangerous type is possible, which allows an unauthenticated user to execute arbitrary code via directory traversal.
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-04 19:36 UTC
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2021-40870

Status: Confirmed

Status Updated: 2022-01-18 00:00 UTC

Exploited: Yes


Timestamps
First Seen: 2022-01-18
Asserted: 2022-01-18

Scope
Notes: KEV entry: Aviatrix Controller Unrestricted Upload of File | Affected: Aviatrix / Aviatrix Controller | Description: Unrestricted upload of a file with a dangerous type is possible, which allows an unauthenticated user to execute arbitrary code via directory traversal. | Required action: Apply updates per vendor instructions. | Due date: 2022-02-01 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-40870

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev


Details
Cwes CWE-25 CWE-96
Feed CISA Known Exploited Vulnerabilities Catalog
Product Aviatrix Controller
Due Date 2022-02-01
Date Added 2022-01-18
Vendorproject Aviatrix
Vulnerabilityname Aviatrix Controller Unrestricted Upload of File
Knownransomwarecampaignuse Unknown

References

Created: 2026-02-02 13:25 UTC | Updated: 2026-02-06 07:53 UTC
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2021-40870

Status: Confirmed

Status Updated: 2026-09-06 00:00 UTC

Exploited: Yes


Characteristics
Severity: 98.0

Timestamps
First Seen: 2023-10-14
Asserted: 2023-10-14
Last Seen: 2026-09-06

Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Aviatrix / Aviatrix Controller | Class: device-management-platform | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-09-06: 39

Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver


Details
1D 3
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class device-management-platform
7D Avg 2
Vendor Aviatrix
30D Avg 1
90D Avg 2
Product Aviatrix Controller
Cisa Kev yes
Connections 39
Observation Date 2026-09-06
Vulnerability Class CVSS
Vulnerability Score 9.8
Vulnerability Severity Critical

References

Created: 2026-07-01 05:54 UTC | Updated: 2026-09-08 01:01 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2021-40870

Status: Confirmed

Status Updated: 2022-01-18 00:00 UTC

Exploited: Yes


Timestamps
First Seen: 2022-01-18
Asserted: 2022-01-18

Scope
Notes: KEVIntel entry: An issue was discovered in Aviatrix Controller 6.x before 6.5-1804.1922. Unrestricted upload of a file with a dangerous type is possible, which... | Affected: Aviatrix / Controller | CVSS: 9.8 (CRITICAL) | 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 An issue was discovered in Aviatrix Controller 6.x before 6.5-1804.1922. Unrestricted upload of a file with a dangerous type is possible, which...
Vendor Aviatrix
Product Controller
Added Date 2022-01-18T00:00:00.000Z
Cvss Score 9.8
Epss Score None
Cvss Severity CRITICAL
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False

References

Created: 2026-06-23 11:13 UTC | Updated: 2026-06-23 11:13 UTC
Show details on NVD website

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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.

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Detection rules are retrieved from Rulezet.

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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.


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