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Fencer Intel
critical 9.8

CVE-2021-40870 kev in the critical feed json

An issue was discovered in Aviatrix Controller 6.x before 6.5-1804.1922.

published 5y ago modified 4mo ago also EUVD-2021-28025

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2022-01-18
epss
93.0%
EPSS 93.0% chance of exploitation in 30 days, percentile 99.8%
public exploits
0
none known, plus a Nuclei check

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.

Patch / fix

cisa required action Apply updates per vendor instructions.

  • aviatrix controller 6.2.2043, 6.3.2490, 6.4.2838, 6.5.1922

Is CVE-2021-40870 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA patch deadline
  4. CISA SSVC: exploitation active

Known exploited

Added
4y ago
Patch by
2022-02-01 (4y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Aviatrix, Aviatrix Controller
CISA name
Aviatrix Controller Unrestricted Upload of File

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
last yr.

Exploit prediction

93.02% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • Nuclei template Aviatrix Controller 6.x before 6.5-1804.1922 - Remote Command Execution nuclei detection template
  • wearetradecraft.com https://wearetradecraft.com/advisories/tc-2021-0002/ referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/164461/Aviatrix-Controller-6.x-Path-Traversal-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-23 Relative Path Traversal

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.