# CVE-2021-40870: Aviatrix Controller Unrestricted Upload of File

Source: https://junglewise.ai/threats/cve-2021-40870-aviatrix-controller-unrestricted-upload-of-file  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-01-18. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2021-40870 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-01-18

Aviatrix Controller allows unauthenticated remote code execution due to unrestricted file uploads. An attacker can utilize directory traversal to upload dangerous file types to sensitive locations on the controller.

## Quick answers

**Is CVE-2021-40870 exploited in the wild?** Yes. CVE-2021-40870 is known to be exploited in the wild, first recorded on 18 January 2022. Treat it as urgent.

**How severe is CVE-2021-40870?** Critical severity, with a CVSS score of 9.8, published 18 January 2022.

**Which products and versions are affected?** Aviatrix Controller 6.x before 6.5-1804.1922.

**Is there a fix for CVE-2021-40870?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2021-40870 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2021-40870?** Check whether you run Aviatrix Controller. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Aviatrix Controller 6.x before 6.5-1804.1922

## Timeline

- 2021-09-11: disclosed: Vendor security note published
- 2021-09-13: disclosed: NVD Published Date
- 2022-01-18: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2021-09-13: exploited: Reported as exploited in the wild per CISA KEV entry date