CVE-2020-24990

Name: CVE-2020-24990
Creator: NVD / NIST
Published: 2020-10-28T19:15:13.62+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.64%

Last modified Jun 17, 2026

CVE-2020-24990 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in QSC Q-SYS Core Manager 8.2.1. By utilizing the TFTP service running on UDP port 69, a remote attacker can perform a directory traversal and obtain operating system files via a TFTP GET request, as demonstrated by reading /etc/passwd or /proc/version.. EPSS estimates a 3.64% chance of exploitation in the next 30 days.

Description

An issue was discovered in QSC Q-SYS Core Manager 8.2.1. By utilizing the TFTP service running on UDP port 69, a remote attacker can perform a directory traversal and obtain operating system files via a TFTP GET request, as demonstrated by reading /etc/passwd or /proc/version.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

3.64%

88.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Qsc	Q-Sys Core Manager	8.2.1

References

http://packetstormsecurity.com/files/159699/QSC-Q-SYS-Core-Manager-8.2.1-Directory-Traversal.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2020/Oct/30Mailing List, Third Party Advisory
https://q-syshelp.qsc.com/Content/Core_Manager/CoreManager_Overview.htmVendor Advisory
http://packetstormsecurity.com/files/159699/QSC-Q-SYS-Core-Manager-8.2.1-Directory-Traversal.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2020/Oct/30Mailing List, Third Party Advisory
https://q-syshelp.qsc.com/Content/Core_Manager/CoreManager_Overview.htmVendor Advisory

Timeline

Published: Oct 28, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-24990?

How severe is CVE-2020-24990?

CVE-2020-24990 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.64% probability of exploitation in the next 30 days.

How do I fix CVE-2020-24990?

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-2020-24990?

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

Scan your code now

Source: NVD / NIST