CVE-2021-40870

An issue was discovered in Aviatrix Controller 6.x before 6.5-1804.1922. Unrestricted upload of a...

9.8 CriticalIn KEVPublic exploit

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

93.0%Up 91.9 points since Sep 13, 2021

What each source reports

NVD Score used 9.8

Record: CVE-2021-40870
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-23
Updated: 2026-11-02

CVE List 9.8

Record: CVE-2021-40870
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

EUVDEUVD-2021-28025 9.8

Record: EUVD-2021-28025
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-w7mg-q4hh-m9cq 9.8

An issue was discovered in Aviatrix Controller 6.x before 6.5-1804.1922. Unrestricted upload of a...

Record: GHSA-w7mg-q4hh-m9cq
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-23, CWE-434, CWE-436
Updated: 2026-11-02

CISA KEV No score

Aviatrix Controller Unrestricted Upload of File

Unrestricted upload of a file with a dangerous type is possible, which allows an unauthenticated user to execute arbitrary code via directory traversal.

Record: CVE-2021-40870
Weakness: CWE-25, CWE-96
Updated: 2026-11-02

Affected products

aviatrix controller

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	0xAgun/CVE-2021-40870	2021-10-07
PoC in GitHub	System00-Security/CVE-2021-40870	2021-10-07
PoC in GitHub	orangmuda/CVE-2021-40870	2021-10-07
PoC in GitHub	JoyGhoshs/CVE-2021-40870	2021-10-08
Nuclei	Aviatrix Controller 6.x before 6.5-1804.1922 - Remote Command Execution

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation, exploits
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, CISA KEV, Nuclei, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-40870 is a critical vulnerability (CVSS 9.8) in Aviatrix Controller, published September 13, 2021. CISA lists it as known to be exploited, since January 18, 2022. EUVD reports exploitation since January 18, 2022. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 93.0%, the 99th percentile. No source names a fixed version.