CVE-2021-37440

Name: CVE-2021-37440
Creator: NVD / NIST
Published: 2021-07-25T22:15:07.93+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.24%

Last modified Jun 17, 2026

CVE-2021-37440 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. NCH Axon PBX v2.22 and earlier allows path traversal for file disclosure via the logprop?file=/.. substring.. EPSS estimates a 1.24% chance of exploitation in the next 30 days.

Description

NCH Axon PBX v2.22 and earlier allows path traversal for file disclosure via the logprop?file=/.. substring.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

1.24%

65.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Nch	Axon Pbx	<= 2.22

References

https://github.com/0xfml/poc/blob/main/NCH/Axon_2.22_LFI.mdExploit, Third Party Advisory
https://www.nch.com.au/pbx/index.htmlProduct
https://github.com/0xfml/poc/blob/main/NCH/Axon_2.22_LFI.mdExploit, Third Party Advisory
https://www.nch.com.au/pbx/index.htmlProduct

Timeline

Published: Jul 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-37440?

NCH Axon PBX v2.22 and earlier allows path traversal for file disclosure via the logprop?file=/.. substring.

How severe is CVE-2021-37440?

CVE-2021-37440 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.24% probability of exploitation in the next 30 days.

How do I fix CVE-2021-37440?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-37440?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST