Critical severity · published Apr 3, 2026
CVE-2017-20234
GarrettCom Magnum 6K and 10K Authentication Bypass via Hardcoded String
9.8
CVSS
0.5%
EPSS
No
On KEV
Description
GarrettCom Magnum 6K and 10K managed switches contain an authentication bypass vulnerability that allows unauthenticated attackers to gain unauthorized access by exploiting a hardcoded string in the authentication mechanism. Attackers can bypass login controls to access administrative functions and sensitive switch configuration without valid credentials.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GM
GarrettCom Magnum 6K and 10K Managed Switches · Belden
through 4.6.0; through 4.7.6 · source: vendor
Affected product
GM
GarrettCom Magnum 6K and 10K Managed Switches
Belden
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-20234
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-20234
vendor-advisory
https://assets.belden.com/m/114be964b4651983/original/Security-Bulletin-MNS-6K-10K-GarrettCom-BSECV-2017-08.pdf
third-party-advisory
https://www.vulncheck.com/advisories/garrettcom-magnum-6k-and-10k-authentication-bypass-via-hardcoded-string