CVE-2020-24990 json
An issue was discovered in QSC Q-SYS Core Manager 8.2.1.
published 2020-10-28 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-17690
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.7%
- EPSS 3.7% chance of exploitation in 30 days, percentile 89%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
3.68% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
q-syshelp.qsc.com
/Content/Core_Manager/CoreManager_Overview.htm
vendor-advisory
-
seclists.org
/fulldisclosure/2020/Oct/30
mailing-list, third-party-advisory
-
packetstormsecurity.com
/files/159699/QSC-Q-SYS-Core-Manager-8.2.1-Directory-Traversal.html
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2020-24990
- NVD CVE-2020-24990
Fencer Vulns 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.