CVE-2020-17383

Name: CVE-2020-17383
Creator: NVD / NIST
Published: 2022-01-24T20:15:07.923+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.25%

Last modified Jun 17, 2026

CVE-2020-17383 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A directory traversal vulnerability on Telos Z/IP One devices through 4.0.0r grants an unauthenticated individual root level access to the device's file system. This can be used to identify configuration settings, password hashes for built-in accounts, and the cleartext password for remote configuration of the device through the WebUI.. EPSS estimates a 4.25% chance of exploitation in the next 30 days.

Description

A directory traversal vulnerability on Telos Z/IP One devices through 4.0.0r grants an unauthenticated individual root level access to the device's file system. This can be used to identify configuration settings, password hashes for built-in accounts, and the cleartext password for remote configuration of the device through the WebUI.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

4.25%

89.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Telosalliance	Z\/Ip One Firmware	<= 4.0.0r

References

https://sra.io/blog-post/Broken Link
https://sra.io/blog/this-traversal-had-a-face-for-radio-cve-2020-17383/Exploit, Patch, Third Party Advisory
https://www.telosalliance.com/downloads?search=software-updates#downloadListingVendor Advisory
https://sra.io/blog-post/Broken Link
https://sra.io/blog/this-traversal-had-a-face-for-radio-cve-2020-17383/Exploit, Patch, Third Party Advisory
https://www.telosalliance.com/downloads?search=software-updates#downloadListingVendor Advisory

Timeline

Published: Jan 24, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-17383?

How severe is CVE-2020-17383?

CVE-2020-17383 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.25% probability of exploitation in the next 30 days.

How do I fix CVE-2020-17383?

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-2020-17383?

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

Scan your code now

Source: NVD / NIST