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CVE-2020-24990

25
FAUCET Score

CVE-2020-24990 describes a directory traversal vulnerability in QSC Q-SYS Core Manager 8.2.1. An unauthenticated remote attacker can exploit the TFTP service on UDP port 69 to retrieve arbitrary operating system files, such as /etc/passwd, from affected devices. This vulnerability has a CVSS score of 7.5 (High), indicating a low attack complexity and high confidentiality impact, with no user interaction required. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
8.2.1CPE matchmatch criteria
cpe:2.3:a:qsc:q-sys_core_manager:8.2.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.68%
Probability of exploitation in next 30 days
EPSS Percentile
88.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0368 is in the 80th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/159699/QSC-Q-SYS-Core-Manager-8.2.1-Directory-Traversal.html
Third Party AdvisoryVDB Entry
seclists.org / fulldisclosure/2020/Oct/30
Mailing ListThird Party Advisory
q-syshelp.qsc.com / Content/Core_Manager/CoreManager_Overview.htm
Vendor Advisory